diff --git a/Jeux_404/main.html b/Jeux_404/main.html
index 529b13f..a208f33 100644
--- a/Jeux_404/main.html
+++ b/Jeux_404/main.html
@@ -8,14 +8,19 @@
             border: 1px solid #d3d3d3;
             background-color: #f1f1f1;
         }
+        
+        .center {
+            text-align: center;
+        }
     </style>
 </head>
 
 <body onload="startGame()">
+    <h1 class="center">Fuyez l'homme en noir !</h1>
     <script src="./script.js"></script>
+
     <br>
-    <button onmousedown="sauter(-0.5)" onmouseup="sauter(0.05)">SAUTER</button>
-    <p>Fuyez l'homme en noir !</p>
+    <button onmousedown="sauter(-0.5)" onmouseup="sauter(0.05)" class="center">SAUTER</button>
 </body>
 
 </html>
\ No newline at end of file
diff --git a/Jeux_404/script.js b/Jeux_404/script.js
index 1f136af..2c1d8d3 100644
--- a/Jeux_404/script.js
+++ b/Jeux_404/script.js
@@ -1,20 +1,15 @@
+//VARIABLES
 var personnage;
 var obstacle = [];
 var score;
 
-function startGame() {
-    personnage = new component(30, 30, "red", 10, 120);
-    personnage.gravity = 0.05;
-    score = new component("30px", "Consolas", "black", 280, 40, "text");
-    plateau.start();
-}
-
 var plateau = {
     canvas: document.createElement("canvas"),
     start: function() {
         this.canvas.width = 480;
         this.canvas.height = 270;
         this.context = this.canvas.getContext("2d");
+        this.canvas.style = "position:absolute; left: 50%; width: 400px; margin-left: -200px;";
         document.body.insertBefore(this.canvas, document.body.childNodes[0]);
         this.frameNo = 0;
         this.interval = setInterval(updateGameArea, 20);
@@ -24,6 +19,14 @@ var plateau = {
     }
 }
 
+//METHODES
+function startGame() {
+    personnage = new component(30, 30, "red", 10, 120);
+    personnage.gravity = 0.05;
+    score = new component("30px", "Consolas", "black", 280, 40, "text");
+    plateau.start();
+}
+
 function component(largeur, longueur, color, x, y, type) {
     this.type = type;
     this.score = 0;
