I don't know if I'm missing something, but I can't seem to pass level 3. I went around the whole level (above to the left, above to the right), and I can't find the exit. Also, I noticed that if you jump as the block is going up, it catapults you to the skies, lol.
I have to agree with the rest, it's a bit hard to remember the keys. I was just spamming WASD until some block stopped. Still, all those things can be easily polished. It was a very fun game, and I love rhythm-based mechanics, good job!