HTML game modes selector

+ pong.css in a separate file

src/client/gameLoop.ts

@@ -1,7 +1,7 @@
 
 import * as c from "./constants.js";
 import * as en from "../shared_js/enums.js"
-import { gc, clientInfo } from "./global.js";
+import { gc, matchOptions, clientInfo } from "./global.js";
 import { wallsMovements } from "../shared_js/wallsMovement.js";
 
 let actual_time: number = Date.now();
@@ -28,7 +28,7 @@ function gameLoop()
 		ball.moveAndBounce(delta_time, [gc.wallTop, gc.wallBottom, gc.playerLeft, gc.playerRight]);
 	});
 
-	if (c.optionsPLACEHOLDER & en.MatchOptions.movingWalls) {
+	if (matchOptions & en.MatchOptions.movingWalls) {
 		wallsMovements(delta_time, gc);
 	}
 }