diff --git a/src/main.rs b/src/main.rs
index dd480a9..7d22713 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -3,6 +3,7 @@
 
 extern crate collections;
 extern crate rand;
+extern crate serialize;
 
 extern crate graphics;
 extern crate piston;
@@ -18,6 +19,8 @@ mod tile;
 type GameWindowBackEnd = GameWindowSDL2;
 
 fn main() {
+    let settings = settings::SettingsInJson::load();
+
     let mut game_window: GameWindowBackEnd = GameWindow::new(
         GameWindowSettings::new (
             "Rust-2048".to_owned(),
diff --git a/src/number_renderer.rs b/src/number_renderer.rs
index 6cb4a5c..d3cea52 100644
--- a/src/number_renderer.rs
+++ b/src/number_renderer.rs
@@ -15,7 +15,7 @@ pub struct NumberRenderer {
 impl NumberRenderer {
     pub fn new(asset_store: &mut AssetStore) -> NumberRenderer {
         NumberRenderer {
-            image: asset_store.load_image("digits.png"),
+            image: asset_store.load_image("digits.png").unwrap(),
         }
     }
 
diff --git a/src/settings.rs b/src/settings.rs
index cb4a22a..1f873ee 100644
--- a/src/settings.rs
+++ b/src/settings.rs
@@ -1,4 +1,13 @@
 
+use std::os::self_exe_path;
+use std::io::{BufferedWriter, BufferedReader};
+use std::io::fs::File;
+use serialize::{
+    json,
+    Encodable,
+    Decodable,
+};
+
 pub static ASSET_FOLDER: &'static str = "assets";
 
 pub static WINDOW_SIZE: [u32, ..2] = [
@@ -55,3 +64,180 @@ pub static BUTTON_COLOR: [f32, ..4] = [142.0 / 255.0, 122.0 / 255.0, 102.0 / 255
 pub static TEXT_DARK_COLOR: [f32, ..4] = [119.0 / 255.0, 110.0 / 255.0, 101.0 / 255.0, 1.0];
 pub static TEXT_LIGHT_COLOR: [f32, ..4] = [249.0 / 255.0, 246.0 / 255.0, 242.0 / 255.0, 1.0];
 
+
+static SETTING_FILENAME: &'static str = "settings.json";
+
+pub struct Settings {
+    pub asset_folder: StrBuf,
+    pub window_size: [u32, ..2],
+    pub window_background_color: [f32, ..3],
+    pub board_padding: f64,
+    pub board_size: [f64, ..2],
+    pub board_offset_y: f64,
+    pub tile_width: int,
+    pub tile_height: int,
+    pub tile_size: f64,
+    pub tile_padding: f64,
+    pub tile_background_color: [f32, ..3],
+    pub tiles_colors: Vec<[f32, ..3]>,
+    pub tile_unknow_color: [f32, ..3],
+    pub tile_move_time: f64,
+    pub tile_new_time: f64,
+    pub tile_combine_time: f64,
+    pub best_rect: [f64, ..4],
+    pub score_rect: [f64, ..4],
+    pub label_color: [f32, ..3],
+    pub button_color: [f32, ..3],
+    pub text_dark_color: [f32, ..3],
+    pub text_light_color: [f32, ..3],
+}
+
+impl Settings {
+    pub fn default_settings() -> Settings {
+        Settings::from_settings_in_json(&SettingsInJson::default_settings())
+    }
+
+    pub fn load() -> Settings {
+        Settings::from_settings_in_json(&SettingsInJson::load())
+    }
+
+    fn from_settings_in_json<'a>(s: &'a SettingsInJson) -> Settings {
+        let board_size = [
+            s.tile_size * s.tile_width as f64 + s.tile_padding * (s.tile_width + 1) as f64,
+            s.tile_size * s.tile_height as f64 + s.tile_padding * (s.tile_height + 1) as f64,
+
+        ];
+        Settings {
+            asset_folder: s.asset_folder,
+            window_size: [
+                (s.board_padding * 2.0 + board_size[0]) as u32,
+                (s.board_padding * 2.0 + board_size[1] + s.board_offset_y) as u32,
+            ],
+            window_background_color: [
+                *s.window_background_color.get(0),
+                *s.window_background_color.get(1),
+                *s.window_background_color.get(2),
+            ],
+            board_padding: s.board_padding,
+            board_size: board_size,
+            board_offset_y: s.board_offset_y,
+            tile_width: s.tile_width,
+            tile_height: s.tile_height,
+            tile_size: s.tile_size,
+            tile_padding: s.tile_padding,
+            tile_background_color: [
+                *s.tile_background_color.get(0),
+                *s.tile_background_color.get(1),
+                *s.tile_background_color.get(2),
+            ],
+        }
+    }
+}
+
+#[deriving(Encodable, Decodable)]
+struct SettingsInJson {
+    asset_folder: StrBuf,
+
+    // r g b (0 - 255)
+    window_background_color: Vec<f32>,
+
+    board_padding: f64,
+    board_offset_y: f64,
+
+    tile_width: int,
+    tile_height: int,
+    tile_size: f64,
+    tile_padding: f64,
+    tile_background_color: Vec<f32>,
+    tiles_colors: Vec<Vec<f32>>,
+    tile_unknow_color: Vec<f32>,
+
+    tile_move_time: f64,
+    tile_new_time: f64,
+    tile_combine_time: f64,
+
+    best_rect: Vec<f64>,
+    score_rect: Vec<f64>,
+
+    label_color: Vec<f32>,
+    button_color: Vec<f32>,
+    text_dark_color: Vec<f32>,
+    text_light_color: Vec<f32>,
+}
+
+impl SettingsInJson {
+    pub fn default_settings() -> SettingsInJson {
+        let mut tiles_colors = Vec::<Vec<f32>>::new();
+        // empty color
+        tiles_colors.push(vec![204.0, 192.0, 179.0]);
+        // 2 color
+        tiles_colors.push(vec![238.0, 228.0, 218.0]);
+        // 4 color
+        tiles_colors.push(vec![237.0, 224.0, 200.0]);
+        // 8 color
+        tiles_colors.push(vec![242.0, 177.0, 121.0]);
+        // 16 color
+        tiles_colors.push(vec![245.0, 149.0, 99.0]);
+        // 32 color
+        tiles_colors.push(vec![246.0, 124.0, 95.0]);
+        // 64 color
+        tiles_colors.push(vec![246.0, 94.0, 59.0]);
+        // 128 color
+        tiles_colors.push(vec![237.0, 207.0, 114.0]);
+        // 256 color
+        tiles_colors.push(vec![237.0, 204.0, 97.0]);
+        // 512 color
+        tiles_colors.push(vec![237.0, 200.0, 80.0]);
+        SettingsInJson {
+            asset_folder: "assets".to_strbuf(),
+            window_background_color: vec![255.0, 248.0, 239.0],
+            board_padding: 12.0,
+            board_offset_y: 128.0,
+            tile_width: 4,
+            tile_height: 4,
+            tile_size: 72.0,
+            tile_padding: 12.0,
+            tile_background_color: vec![187.0, 173.0, 160.0],
+            tiles_colors: tiles_colors,
+            tile_unknow_color: vec![200.0, 0.0, 0.0],
+            tile_move_time: 0.1,
+            tile_new_time: 0.1,
+            tile_combine_time: 0.1,
+            best_rect: vec![284.0, 12.0, 96.0, 48.0,],
+            score_rect: vec![176.0, 12.0, 96.0, 48.0],
+            label_color: vec![187.0, 173.0, 160.0],
+            button_color: vec![142.0, 122.0, 102.0],
+            text_dark_color: vec![119.0, 110.0, 101.0],
+            text_light_color: vec![249.0, 246.0, 242.0],
+        }
+    }
+
+    pub fn load() -> SettingsInJson {
+        let exe_path = self_exe_path();
+        if exe_path.is_none() {
+            return SettingsInJson::default_settings();
+        }
+        let exe_path = exe_path.unwrap();
+        let path = exe_path.join(Path::new(SETTING_FILENAME));
+        if !path.exists() || !path.is_file() {
+            return SettingsInJson::default_settings();
+        }
+        let file = File::open(&path).unwrap();
+        let mut reader = BufferedReader::new(file);
+        let mut decoder = json::Decoder::new(json::from_reader(&mut reader).unwrap());
+        Decodable::decode(&mut decoder).unwrap()
+    }
+
+    pub fn save(&self) {
+        let exe_path = self_exe_path().unwrap();
+        let path = exe_path.join(Path::new(SETTING_FILENAME));
+        let file = File::create(&path).unwrap();
+        let mut writer = BufferedWriter::new(file);
+        let mut encoder = json::Encoder::new(&mut writer);
+        match self.encode(&mut encoder) {
+            Ok(()) => (),
+            Err(e) => { println!("WARNING: Failed to save settings: {}", e); },
+        }
+    }
+}
+