18 seconds before submission!? Cut it a little close there, huh? Download was easy and almost idiot-proof, good work. A well made little rhythm game, with a very solid soundtrack. I think that this has a lot of potential with some polish and expansion.
I feel that there needed to be some visual feedback and score, as the only way I could tell I was hitting notes was that the blocks disappeared. Some win/end condition would have meant that there wasn't an awkward bit where you realise that the game is over. Some slight animation on the character and environment would have really improved the polish, but perhaps that may have been out of scope. Other songs would have also been nice, but again, perhaps out of the range of what you could do at this point in time, which is entirely valid.
There is room to make a game that is worth putting on the marketplace, but some expansion and polish would definitely be needed. For this project though, I think that this game comfortably meets the requirements. Well done.