I like the idea, but it's very simple and there isn't much to it. Here's a list of things you could add:

- mud puddles that slow the players down
- walls that switch on/off on a timer
- walls that apply to only one player, ex: red player can pass through red walls but blue player can't
- power ups: speed boost, ghost ability that lets you go through walls, switching early
- a single player mode against bots: most players are alone. I made a two player game once and it didn't receive a lot of attention.

Oh! Definitely add some sound!

I think this game has potential :)

Interesante el juego, pero por el ancho del campo hay varias ocasiones en que se puede atorar cualquiera de los jugadores y con ello se disminuye el tiempo de ataque.