It's hard to understand what to do but I've figured it out myself after a while. Difficulty grows too fast so after the score of 40 it's a total hardcore-mode. But still, I like the visual, music, and the idea of the game :)
And, yeah, 3 hours?! OMG, if you've done it in 3 hours I can't imagine what would it look like if you had 48 hours!
Good job