Tried the game and it was pretty good! The polygonal look fits really well, reminds me of games by Introversion.
A couple of suggestions:
* Add gamepad support, there's a browser API for that. * Things are way too tiny compared to VS running on same screen. It was often hard to precisely maneuver and distinguish between entities.
On a side note, I'd definitely play a mix of fl0w/Spore with VS.