V0 is working

levels/1.json

@@ -10,6 +10,7 @@
     ],
     "snake": [
         [4,2], [4,1], [3,1], [2,1]
-    ]
+    ],
+    "firstKey": "ArrowRight"
 
 }

levels/2.json

@@ -13,6 +13,6 @@
       [6,6],
       [6,5],
       [6,4]
-    ]
+    ],
-
+    "firstKey": "ArrowRight"
 }

script.js

@@ -113,6 +113,8 @@ async function startGame(gameID) {
         snake.push([s[0]-1, s[1]-1]);
     })
 
+    // Initialize pressed key
+    let key = level.firstKey;
 
     /**
      * Step function
@@ -122,11 +124,70 @@ async function startGame(gameID) {
      */
     let interval = setInterval(() => step(), level.delay);
     function step() {
-        console.log("render")
         
+        // Check if a game was destroyed
         if(!canvas.isConnected)
             clearInterval(interval)
 
+        // Move the snake if required
+        if(key) {
+            let newHead = Array.from(snake[snake.length-1]);
+            let increaseSize = false;
+
+            // Make the snake move
+            switch(key) {
+                case "ArrowDown":
+                    newHead[0]++;
+                    break;
+                
+                case "ArrowUp":
+                    newHead[0]--;
+                    break;
+                
+                case "ArrowLeft":
+                    newHead[1]--;
+                    break;
+                
+                case "ArrowRight":
+                    newHead[1]++;
+                    break;
+            }
+            
+
+            if(newHead[0] < 0 || newHead[1] < 0 || 
+                newHead[0] >= level.dimensions[0] || newHead[1] >= level.dimensions[1]) {
+                gameOver();
+                return;
+            }
+
+            // Trigger appropriate action
+            switch(map[newHead[0]][newHead[1]]) {
+
+                case FOOD:
+                    increaseSize = true;
+                    break;
+                
+                case WALL:
+                    gameOver();
+                    break;
+
+            }
+
+            // Push new snake position
+            snake.push(newHead);
+            map[newHead[0]][newHead[1]] = SNAKE
+            
+            // Remove the end of the snake if he has not eaten anything
+            if(!increaseSize) {
+                const oldPos = snake.shift()
+                map[oldPos[0]][oldPos[1]] = EMPTY
+            }
+
+        }
+
+
+        
+        
         // Redraw screen
         ctx.clearRect(0, 0, canvas.width, canvas.height)
         
@@ -174,7 +235,6 @@ async function startGame(gameID) {
                                 0, // startAngle
                                 2*Math.PI) // End angle
                             ctx.fill();
-                            console.log(x, y)
                         }
                             
 
@@ -186,6 +246,21 @@ async function startGame(gameID) {
             }
         }
     }
+
+    /**
+     * Call this function once the user loose the game
+     */
+    function gameOver() {
+        clearInterval(interval);
+        alert("Game over !!!");
+        location.href = "#";
+    }
+
+    // Listen for key press events
+    document.body.addEventListener("keydown", (ev) => {
+        if(["ArrowDown", "ArrowLeft", "ArrowRight", "ArrowUp"].includes(ev.key))
+            key = ev.key;
+    });
 }
 
 /**