bad
first- the whole "die if you hit the left and right keys at the same time" thing needs to go, it renders the game unplayable. After that, the fact that the continue button is rigged to only allow you to continue if you make a mochigames account is complete and utter bull, especially if you're putting the game here as opposed to putting it there.
other than that, though, the graphics weren't bad, and it looked like it'd have been pretty decent- though I wouldn't know, because I'd accidentally tap the right arrow key and invariably end up crashing and having to reload to restart.
Short version: Loose the keydeath thing, loose the mochigames forced account to continue thing, and it may be a good game.