diff --git a/sources/js/Game.js b/sources/js/Game.js
index 5c0a724..a641870 100644
--- a/sources/js/Game.js
+++ b/sources/js/Game.js
@@ -155,7 +155,6 @@ export class Game {
     /**
      * Update the snake on the world and check for collision
      */
-
     updateSnake() {
         this.snake.body.forEach(([x,y], i) => {
             if (!(x in this.world) || !(y in this.world[x]))
diff --git a/sources/js/Tile.js b/sources/js/Tile.js
index e89f465..0a6837b 100644
--- a/sources/js/Tile.js
+++ b/sources/js/Tile.js
@@ -191,6 +191,10 @@ export class Tile {
         this.game.ctx.stroke();
     }
 
+    /**
+     * Get the direction of a sprite depending of the next sprite
+     * @returns {directions}
+     */
     getDirection() {
         const np = this.game.snake.body[this.game.snake.body.findIndex(([x,y]) => x === this.x && y === this.y)-1];
         const d = [this.x, this.y].map((n, i) => -(n - np[i]));
@@ -198,6 +202,11 @@ export class Tile {
         return Object.values(directions).find(([x, y]) => d[0] === x && d[1] === y);
     }
 
+    /**
+     * Rotate a sprite depending of the input direction or the next sprite
+     * @param {[int, int]} canvasPos
+     * @param {[int, int]} size
+     */
     rotate(canvasPos, size) {
         const cx = canvasPos[0] + 0.5 * size[0];
         const cy = canvasPos[1] + 0.5 * size[1];