review
Very cool concept. The color thing has been done before, but I like the way that you used it in this game. There really shouldn't be any lag. I'm not sure how you're doing those particles but if it's lagging you should definitely tone them down. It might even be a good idea to have it an option to remove them. I was even lagging in low quality, which just shouldn't be happening. I was enjoying the game and then I paused and accidentally clicked return to menu when I clicked back into the game... it would be nice to be able to click out of the pause menu to return to the game, instead of having to press p, just because you need to have your fingers by the asd keys.
Also on a more technical note I noticed your particles made a box effect, so I'm guessing you did xspeed = Math.random()*30-15 or something like that, and same for the yspeed. If you used sin and cos and a random angle you'd get a circular effect. angle = Math.random()*Math.PI*2; xspeed = Math.cos(angle); yspeed = Math.sin(angle);
At least I think that is right, hopefully. Anyway cool game.