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diff --git a/piston-tutorials/getting-started/Cargo.toml b/piston-tutorials/getting-started/Cargo.toml
deleted file mode 100644
index ee4bc6d..0000000
--- a/piston-tutorials/getting-started/Cargo.toml
+++ /dev/null
@@ -1,17 +0,0 @@
-[package]
-name = "spinning-square"
-version = "0.1.0"
-authors = [
-  "Dan Buch <dan@meatballhat.com>",
-  "TyOverby <ty@pre-alpha.com>",
-  "Nikita Pekin <contact@nikitapek.in>"
-]
-
-[[bin]]
-name = "spinning-square"
-
-[dependencies]
-piston = "0.53.0"
-piston2d-graphics = "0.43.0"
-pistoncore-glutin_window = "0.70.1"
-piston2d-opengl_graphics = "0.82.0"
diff --git a/piston-tutorials/getting-started/src/main.rs b/piston-tutorials/getting-started/src/main.rs
deleted file mode 100644
index 47f5d2b..0000000
--- a/piston-tutorials/getting-started/src/main.rs
+++ /dev/null
@@ -1,70 +0,0 @@
-extern crate glutin_window;
-extern crate graphics;
-extern crate opengl_graphics;
-extern crate piston;
-
-use glutin_window::GlutinWindow as Window;
-use opengl_graphics::{GlGraphics, OpenGL};
-use piston::event_loop::{EventSettings, Events};
-use piston::input::{RenderArgs, RenderEvent, UpdateArgs, UpdateEvent};
-use piston::window::WindowSettings;
-
-pub struct App {
-    gl: GlGraphics,
-    rotation: f64,
-}
-
-impl App {
-    fn render(&mut self, args: &RenderArgs) {
-        use graphics::*;
-
-        const GREEN: [f32; 4] = [0.0, 1.0, 0.0, 1.0];
-        const RED: [f32; 4] = [1.0, 0.0, 0.0, 1.0];
-
-        let square = rectangle::square(0.0, 0.0, 50.0);
-        let rotation = self.rotation;
-        let (x, y) = (args.window_size[0] / 2.0, args.window_size[1] / 2.0);
-
-        self.gl.draw(args.viewport(), |c, gl| {
-            clear(GREEN, gl);
-
-            let transform = c
-                .transform
-                .trans(x, y)
-                .rot_rad(rotation)
-                .trans(-25.0, -25.0);
-
-            rectangle(RED, square, transform, gl);
-        })
-    }
-
-    fn update(&mut self, args: &UpdateArgs) {
-        self.rotation += 2.0 * args.dt;
-    }
-}
-
-fn main() {
-    let opengl = OpenGL::V3_2;
-
-    let mut window: Window = WindowSettings::new("spinning-square", [200, 200])
-        .graphics_api(opengl)
-        .exit_on_esc(true)
-        .build()
-        .unwrap();
-
-    let mut app = App {
-        gl: GlGraphics::new(opengl),
-        rotation: 0.0,
-    };
-
-    let mut events = Events::new(EventSettings::new());
-    while let Some(e) = events.next(&mut window) {
-        if let Some(args) = e.render_args() {
-            app.render(&args);
-        }
-
-        if let Some(args) = e.update_args() {
-            app.update(&args);
-        }
-    }
-}
diff --git a/piston-tutorials/sudoku/Cargo.lock b/piston-tutorials/sudoku/Cargo.lock
deleted file mode 100644
index 6e820dd..0000000
--- a/piston-tutorials/sudoku/Cargo.lock
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diff --git a/piston-tutorials/sudoku/Cargo.toml b/piston-tutorials/sudoku/Cargo.toml
deleted file mode 100644
index adbf332..0000000
--- a/piston-tutorials/sudoku/Cargo.toml
+++ /dev/null
@@ -1,12 +0,0 @@
-[package]
-name = "sudoku"
-version = "0.1.0"
-edition = "2021"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[dependencies]
-piston = "0.53.2"
-piston2d-graphics = "0.43.0"
-piston2d-opengl_graphics = "0.82.0"
-pistoncore-glutin_window = "0.70.1"
diff --git a/piston-tutorials/sudoku/assets/FiraSans-Regular.ttf b/piston-tutorials/sudoku/assets/FiraSans-Regular.ttf
deleted file mode 100644
index a4e6563..0000000
Binary files a/piston-tutorials/sudoku/assets/FiraSans-Regular.ttf and /dev/null differ
diff --git a/piston-tutorials/sudoku/assets/LICENSE b/piston-tutorials/sudoku/assets/LICENSE
deleted file mode 100644
index b4a3967..0000000
--- a/piston-tutorials/sudoku/assets/LICENSE
+++ /dev/null
@@ -1,99 +0,0 @@
-Copyright (c) 2014, Mozilla Foundation https://mozilla.org/
-with Reserved Font Name Fira Sans.
-
-Copyright (c) 2014, Mozilla Foundation https://mozilla.org/
-with Reserved Font Name Fira Mono.
-
-Copyright (c) 2014, Telefonica S.A.
-
-This Font Software is licensed under the SIL Open Font License, Version 1.1.
-This license is copied below, and is also available with a FAQ at:
-http://scripts.sil.org/OFL
-
-
------------------------------------------------------------
-SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
------------------------------------------------------------
-
-PREAMBLE
-The goals of the Open Font License (OFL) are to stimulate worldwide
-development of collaborative font projects, to support the font creation
-efforts of academic and linguistic communities, and to provide a free and
-open framework in which fonts may be shared and improved in partnership
-with others.
-
-The OFL allows the licensed fonts to be used, studied, modified and
-redistributed freely as long as they are not sold by themselves. The
-fonts, including any derivative works, can be bundled, embedded,
-redistributed and/or sold with any software provided that any reserved
-names are not used by derivative works. The fonts and derivatives,
-however, cannot be released under any other type of license. The
-requirement for fonts to remain under this license does not apply
-to any document created using the fonts or their derivatives.
-
-DEFINITIONS
-"Font Software" refers to the set of files released by the Copyright
-Holder(s) under this license and clearly marked as such. This may
-include source files, build scripts and documentation.
-
-"Reserved Font Name" refers to any names specified as such after the
-copyright statement(s).
-
-"Original Version" refers to the collection of Font Software components as
-distributed by the Copyright Holder(s).
-
-"Modified Version" refers to any derivative made by adding to, deleting,
-or substituting -- in part or in whole -- any of the components of the
-Original Version, by changing formats or by porting the Font Software to a
-new environment.
-
-"Author" refers to any designer, engineer, programmer, technical
-writer or other person who contributed to the Font Software.
-
-PERMISSION & CONDITIONS
-Permission is hereby granted, free of charge, to any person obtaining
-a copy of the Font Software, to use, study, copy, merge, embed, modify,
-redistribute, and sell modified and unmodified copies of the Font
-Software, subject to the following conditions:
-
-1) Neither the Font Software nor any of its individual components,
-in Original or Modified Versions, may be sold by itself.
-
-2) Original or Modified Versions of the Font Software may be bundled,
-redistributed and/or sold with any software, provided that each copy
-contains the above copyright notice and this license. These can be
-included either as stand-alone text files, human-readable headers or
-in the appropriate machine-readable metadata fields within text or
-binary files as long as those fields can be easily viewed by the user.
-
-3) No Modified Version of the Font Software may use the Reserved Font
-Name(s) unless explicit written permission is granted by the corresponding
-Copyright Holder. This restriction only applies to the primary font name as
-presented to the users.
-
-4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
-Software shall not be used to promote, endorse or advertise any
-Modified Version, except to acknowledge the contribution(s) of the
-Copyright Holder(s) and the Author(s) or with their explicit written
-permission.
-
-5) The Font Software, modified or unmodified, in part or in whole,
-must be distributed entirely under this license, and must not be
-distributed under any other license. The requirement for fonts to
-remain under this license does not apply to any document created
-using the Font Software.
-
-TERMINATION
-This license becomes null and void if any of the above conditions are
-not met.
-
-DISCLAIMER
-THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
-OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
-COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
-DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
-FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
-OTHER DEALINGS IN THE FONT SOFTWARE.
diff --git a/piston-tutorials/sudoku/src/gameboard.rs b/piston-tutorials/sudoku/src/gameboard.rs
deleted file mode 100644
index 8611167..0000000
--- a/piston-tutorials/sudoku/src/gameboard.rs
+++ /dev/null
@@ -1,155 +0,0 @@
-//! Game board logic.
-
-use std::fs::read_to_string;
-
-const SIZE: usize = 9;
-
-#[derive(Clone, Copy, Debug, Default, PartialEq)]
-pub struct Cell {
-    pub value: u8,
-    pub loaded: bool,
-    pub invalid: bool,
-}
-
-#[derive(Debug, PartialEq)]
-pub struct Gameboard {
-    pub cells: [[Cell; SIZE]; SIZE],
-    pub completed: bool,
-}
-
-impl Gameboard {
-    pub fn new() -> Gameboard {
-        Gameboard {
-            cells: [[Cell::default(); SIZE]; SIZE],
-            completed: false,
-        }
-    }
-
-    pub fn from_cells(cells: [[u8; SIZE]; SIZE]) -> Gameboard {
-        let mut ret = Gameboard::new();
-        for (i, row) in cells.iter().enumerate() {
-            for (j, &col) in row.iter().enumerate() {
-                ret.cells[i][j] = Cell {
-                    value: col,
-                    loaded: col != 0,
-                    invalid: false,
-                };
-            }
-        }
-        ret
-    }
-
-    pub fn char(&self, ind: [usize; 2]) -> Option<char> {
-        Some(match self.cells[ind[1]][ind[0]].value {
-            1 => '1',
-            2 => '2',
-            3 => '3',
-            4 => '4',
-            5 => '5',
-            6 => '6',
-            7 => '7',
-            8 => '8',
-            9 => '9',
-            _ => return None,
-        })
-    }
-
-    pub fn set(&mut self, ind: [usize; 2], val: u8) {
-        if !self.cells[ind[1]][ind[0]].loaded {
-            self.validate(ind, val);
-            self.cells[ind[1]][ind[0]].value = val;
-        }
-
-        self.completed = self
-            .cells
-            .iter()
-            .flatten()
-            .all(|cell| !cell.invalid && cell.value != 0);
-    }
-
-    pub fn load_sdm(filename: &str) -> Self {
-        let data = read_to_string(filename).expect("failed to read SDM file");
-        let mut cells = [[Cell::default(); SIZE]; SIZE];
-        let mut row = 0;
-        let mut col = 0;
-        for c in data.chars() {
-            if col == SIZE {
-                col = 0;
-                row += 1;
-            }
-            if let Some(v) = c.to_digit(10) {
-                let value = v as u8;
-                cells[row][col] = Cell {
-                    value,
-                    loaded: value != 0,
-                    invalid: false,
-                };
-                col += 1;
-            }
-        }
-
-        Self {
-            cells,
-            completed: false,
-        }
-    }
-
-    fn validate(&mut self, ind: [usize; 2], val: u8) {
-        let [b, a] = ind;
-        for i in 0..SIZE {
-            if i == a {
-                continue;
-            }
-            if self.cells[a][i].value == val {
-                self.cells[a][b].invalid = true;
-                return;
-            }
-        }
-
-        for i in 0..SIZE {
-            if i == b {
-                continue;
-            }
-            if self.cells[i][b].value == val {
-                self.cells[a][b].invalid = true;
-                return;
-            }
-        }
-
-        let (row, col) = (a / 3, b / 3);
-        for i in 3 * row..3 * row + 3 {
-            for j in 3 * col..3 * col + 3 {
-                if i == a && j == b {
-                    continue;
-                }
-                if self.cells[i][j].value == val {
-                    self.cells[a][b].invalid = true;
-                    return;
-                }
-            }
-        }
-        self.cells[a][b].invalid = false;
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn load_sdm() {
-        let got = Gameboard::load_sdm("static/puzzle.sdm");
-        let want = Gameboard::from_cells([
-            [0, 1, 6, 4, 0, 0, 0, 0, 0],
-            [2, 0, 0, 0, 0, 9, 0, 0, 0],
-            [4, 0, 0, 0, 0, 0, 0, 6, 2],
-            [0, 7, 0, 2, 3, 0, 1, 0, 0],
-            [1, 0, 0, 0, 0, 0, 0, 0, 3],
-            [0, 0, 3, 0, 8, 7, 0, 4, 0],
-            [9, 6, 0, 0, 0, 0, 0, 0, 5],
-            [0, 0, 0, 8, 0, 0, 0, 0, 7],
-            [0, 0, 0, 0, 0, 6, 8, 2, 0],
-        ]);
-        assert_eq!(got, want);
-    }
-}
diff --git a/piston-tutorials/sudoku/src/gameboard_controller.rs b/piston-tutorials/sudoku/src/gameboard_controller.rs
deleted file mode 100644
index 11c1ace..0000000
--- a/piston-tutorials/sudoku/src/gameboard_controller.rs
+++ /dev/null
@@ -1,57 +0,0 @@
-//! Gameboard controller
-
-use piston::GenericEvent;
-
-use crate::Gameboard;
-
-pub struct GameboardController {
-    pub gameboard: Gameboard,
-    pub selected_cell: Option<[usize; 2]>,
-    cursor_pos: [f64; 2],
-}
-
-impl GameboardController {
-    pub fn new(gameboard: Gameboard) -> GameboardController {
-        GameboardController {
-            gameboard: gameboard,
-            selected_cell: None,
-            cursor_pos: [0.0; 2],
-        }
-    }
-
-    pub fn event<E: GenericEvent>(&mut self, pos: [f64; 2], size: f64, e: &E) {
-        use piston::input::{Button, Key, MouseButton};
-
-        if let Some(pos) = e.mouse_cursor_args() {
-            self.cursor_pos = pos;
-        }
-
-        if let Some(Button::Mouse(MouseButton::Left)) = e.press_args() {
-            let x = self.cursor_pos[0] - pos[0];
-            let y = self.cursor_pos[1] - pos[1];
-
-            if x >= 0.0 && x < size && y >= 0.0 && y < size {
-                let cell_x = (x / size * 9.0) as usize;
-                let cell_y = (y / size * 9.0) as usize;
-                self.selected_cell = Some([cell_x, cell_y]);
-            }
-        }
-
-        if let Some(Button::Keyboard(key)) = e.press_args() {
-            if let Some(ind) = self.selected_cell {
-                match key {
-                    Key::D1 => self.gameboard.set(ind, 1),
-                    Key::D2 => self.gameboard.set(ind, 2),
-                    Key::D3 => self.gameboard.set(ind, 3),
-                    Key::D4 => self.gameboard.set(ind, 4),
-                    Key::D5 => self.gameboard.set(ind, 5),
-                    Key::D6 => self.gameboard.set(ind, 6),
-                    Key::D7 => self.gameboard.set(ind, 7),
-                    Key::D8 => self.gameboard.set(ind, 8),
-                    Key::D9 => self.gameboard.set(ind, 9),
-                    _ => {}
-                }
-            }
-        }
-    }
-}
diff --git a/piston-tutorials/sudoku/src/gameboard_view.rs b/piston-tutorials/sudoku/src/gameboard_view.rs
deleted file mode 100644
index 40f2622..0000000
--- a/piston-tutorials/sudoku/src/gameboard_view.rs
+++ /dev/null
@@ -1,210 +0,0 @@
-//! Gameboard view.
-
-use graphics::character::CharacterCache;
-use graphics::types::Color;
-use graphics::{Context, Graphics};
-
-use crate::gameboard_controller::GameboardController;
-
-pub struct GameboardViewSettings {
-    pub position: [f64; 2],
-    pub size: f64,
-    pub background_color: Color,
-    pub border_color: Color,
-    pub board_edge_color: Color,
-    pub section_edge_color: Color,
-    pub cell_edge_color: Color,
-    pub board_edge_radius: f64,
-    pub section_edge_radius: f64,
-    pub cell_edge_radius: f64,
-    pub selected_cell_background_color: Color,
-    pub text_color: Color,
-    pub loaded_cell_background_color: Color,
-    pub invalid_cell_background_color: Color,
-    pub invalid_selected_cell_background_color: Color,
-    pub completed_background_color: Color,
-}
-
-impl GameboardViewSettings {
-    pub fn new() -> GameboardViewSettings {
-        GameboardViewSettings {
-            position: [10.0; 2],
-            size: 400.0,
-            background_color: [0.8, 0.8, 1.0, 1.0],
-            border_color: [0.0, 0.0, 0.2, 1.0],
-            board_edge_color: [0.0, 0.0, 0.2, 1.0],
-            section_edge_color: [0.0, 0.0, 0.2, 1.0],
-            cell_edge_color: [0.0, 0.0, 0.2, 1.0],
-            board_edge_radius: 3.0,
-            section_edge_radius: 2.0,
-            cell_edge_radius: 1.0,
-            selected_cell_background_color: [0.9, 0.9, 1.0, 1.0],
-            text_color: [0.0, 0.0, 0.1, 1.0],
-            loaded_cell_background_color: [1.0, 1.0, 1.0, 1.0],
-            invalid_cell_background_color: [1.0, 0.0, 0.0, 1.0],
-            invalid_selected_cell_background_color: [1.0, 0.0, 0.5, 1.0],
-            completed_background_color: [0.0, 1.0, 0.0, 1.0],
-        }
-    }
-}
-
-pub struct GameboardView {
-    pub settings: GameboardViewSettings,
-}
-
-impl GameboardView {
-    pub fn new(settings: GameboardViewSettings) -> GameboardView {
-        GameboardView { settings: settings }
-    }
-
-    pub fn draw<G: Graphics, C>(
-        &self,
-        controller: &GameboardController,
-        glyphs: &mut C,
-        c: &Context,
-        g: &mut G,
-    ) where
-        C: CharacterCache<Texture = G::Texture>,
-    {
-        use graphics::{Image, Line, Rectangle, Transformed};
-
-        let ref settings = self.settings;
-        let board_rect = [
-            settings.position[0],
-            settings.position[1],
-            settings.size,
-            settings.size,
-        ];
-
-        if controller.gameboard.completed {
-            Rectangle::new(settings.completed_background_color).draw(
-                board_rect,
-                &c.draw_state,
-                c.transform,
-                g,
-            );
-        } else {
-            Rectangle::new(settings.background_color).draw(
-                board_rect,
-                &c.draw_state,
-                c.transform,
-                g,
-            );
-
-            for i in 0..9 {
-                for j in 0..9 {
-                    if controller.gameboard.cells[i][j].loaded {
-                        color_cell(
-                            settings,
-                            [j, i],
-                            settings.loaded_cell_background_color,
-                            c,
-                            g,
-                        );
-                    } else if controller.gameboard.cells[i][j].invalid {
-                        color_cell(
-                            settings,
-                            [j, i],
-                            settings.invalid_cell_background_color,
-                            c,
-                            g,
-                        );
-                    }
-                }
-            }
-
-            if let Some(ind) = controller.selected_cell {
-                let cell = controller.gameboard.cells[ind[1]][ind[0]];
-                let color = if !cell.loaded {
-                    if !cell.invalid {
-                        settings.selected_cell_background_color
-                    } else {
-                        settings.invalid_selected_cell_background_color
-                    }
-                } else {
-                    settings.loaded_cell_background_color
-                };
-                color_cell(settings, ind, color, c, g);
-            }
-        }
-
-        let text_image = Image::new_color(settings.text_color);
-        let cell_size = settings.size / 9.0;
-
-        for j in 0..9 {
-            for i in 0..9 {
-                if let Some(ch) = controller.gameboard.char([i, j]) {
-                    let pos = [
-                        settings.position[0] + i as f64 * cell_size + 15.0,
-                        settings.position[1] + j as f64 * cell_size + 34.0,
-                    ];
-
-                    if let Ok(character) = glyphs.character(34, ch) {
-                        let ch_x = pos[0] + character.left();
-                        let ch_y = pos[1] - character.top();
-                        let text_image = text_image.src_rect([
-                            character.atlas_offset[0],
-                            character.atlas_offset[1],
-                            character.atlas_size[0],
-                            character.atlas_size[1],
-                        ]);
-                        text_image.draw(
-                            character.texture,
-                            &c.draw_state,
-                            c.transform.trans(ch_x, ch_y),
-                            g,
-                        );
-                    }
-                }
-            }
-        }
-
-        let cell_edge = Line::new(settings.cell_edge_color, settings.cell_edge_radius);
-        let section_edge = Line::new(settings.section_edge_color, settings.section_edge_radius);
-
-        for i in 0..9 {
-            let x = settings.position[0] + i as f64 / 9.0 * settings.size;
-            let y = settings.position[1] + i as f64 / 9.0 * settings.size;
-            let x2 = settings.position[0] + settings.size;
-            let y2 = settings.position[1] + settings.size;
-
-            let vline = [x, settings.position[1], x, y2];
-            let hline = [settings.position[0], y, x2, y];
-
-            if (i % 3) == 0 {
-                section_edge.draw(vline, &c.draw_state, c.transform, g);
-                section_edge.draw(hline, &c.draw_state, c.transform, g);
-            } else {
-                cell_edge.draw(vline, &c.draw_state, c.transform, g);
-                cell_edge.draw(hline, &c.draw_state, c.transform, g);
-            }
-        }
-
-        Rectangle::new_border(settings.board_edge_color, settings.board_edge_radius).draw(
-            board_rect,
-            &c.draw_state,
-            c.transform,
-            g,
-        );
-    }
-}
-
-fn color_cell<G: Graphics>(
-    settings: &GameboardViewSettings,
-    ind: [usize; 2],
-    color: [f32; 4],
-    c: &Context,
-    g: &mut G,
-) {
-    use graphics::Rectangle;
-
-    let cell_size = settings.size / 9.0;
-    let pos = [ind[0] as f64 * cell_size, ind[1] as f64 * cell_size];
-    let cell_rect = [
-        settings.position[0] + pos[0],
-        settings.position[1] + pos[1],
-        cell_size,
-        cell_size,
-    ];
-    Rectangle::new(color).draw(cell_rect, &c.draw_state, c.transform, g);
-}
diff --git a/piston-tutorials/sudoku/src/main.rs b/piston-tutorials/sudoku/src/main.rs
deleted file mode 100644
index 3e3da24..0000000
--- a/piston-tutorials/sudoku/src/main.rs
+++ /dev/null
@@ -1,57 +0,0 @@
-//////#![deny(missing_docs)]
-
-//! An Sudoko please.
-
-extern crate glutin_window;
-
-use glutin_window::GlutinWindow;
-use opengl_graphics::{Filter, GlGraphics, GlyphCache, OpenGL, TextureSettings};
-use piston::event_loop::{EventSettings, Events};
-use piston::{EventLoop, RenderEvent, WindowSettings};
-
-pub use crate::gameboard::Gameboard;
-pub use crate::gameboard_controller::GameboardController;
-pub use crate::gameboard_view::{GameboardView, GameboardViewSettings};
-
-mod gameboard;
-mod gameboard_controller;
-mod gameboard_view;
-
-fn main() {
-    let opengl = OpenGL::V3_2;
-    let settings = WindowSettings::new("Sudoku", (640, 480))
-        .exit_on_esc(true)
-        .graphics_api(opengl)
-        .vsync(true);
-    let mut window: GlutinWindow = settings.build().expect("could not create window");
-    let mut events = Events::new(EventSettings::new().lazy(true));
-    let mut gl = GlGraphics::new(opengl);
-
-    let args: Vec<_> = std::env::args().collect();
-    let infile = args.get(1).expect("usage: sudoku <sdm-file>");
-
-    let gameboard = Gameboard::load_sdm(infile);
-    let mut gameboard_controller = GameboardController::new(gameboard);
-    let gameboard_view_settings = GameboardViewSettings::new();
-    let gameboard_view = GameboardView::new(gameboard_view_settings);
-
-    let texture_settings = TextureSettings::new().filter(Filter::Nearest);
-    let ref mut glyphs = GlyphCache::new("assets/FiraSans-Regular.ttf", (), texture_settings)
-        .expect("Could not load font");
-
-    while let Some(e) = events.next(&mut window) {
-        gameboard_controller.event(
-            gameboard_view.settings.position,
-            gameboard_view.settings.size,
-            &e,
-        );
-        if let Some(args) = e.render_args() {
-            gl.draw(args.viewport(), |c, g| {
-                use graphics::clear;
-
-                clear([1.0; 4], g);
-                gameboard_view.draw(&gameboard_controller, glyphs, &c, g);
-            })
-        }
-    }
-}
diff --git a/piston-tutorials/sudoku/static/puzzle-almost-solved.sdm b/piston-tutorials/sudoku/static/puzzle-almost-solved.sdm
deleted file mode 100644
index 6f09bfa..0000000
--- a/piston-tutorials/sudoku/static/puzzle-almost-solved.sdm
+++ /dev/null
@@ -1 +0,0 @@
-517962483236847915498351762371695248654218397829734156765129834142583679983476520
diff --git a/piston-tutorials/sudoku/static/puzzle.sdm b/piston-tutorials/sudoku/static/puzzle.sdm
deleted file mode 100644
index 62cb0e9..0000000
--- a/piston-tutorials/sudoku/static/puzzle.sdm
+++ /dev/null
@@ -1 +0,0 @@
-016400000200009000400000062070230100100000003003087040960000005000800007000006820