Idea is good, but...
The game is good, but it NEEDS mouse controls.
Sure, you can sound like an arrogant jackass when the player gets a low score and it says, "You need a mouse to play this game." but why? Its dissuades people from likeing the game.
You need a mouse? No shit!
The speed is ridiculous as far as acceleration and deceleration are concerned, and the mouse keys are a terrible substitute for the precision afforded to you by the mouse.
The idea is solid, the graphics are too, but in all seriousness, this game cries out for mouse controls.