Based on what the game's title was and the picture for it, I expected more from this. The upgrade system was basic but it worked. A personal irk of mine with it was that, "after hit" wasn't in the same font style as the other two were. Also, the music was very boring and repetitive, almost to the point of annoyance.
At first, I felt like the game was too slow. Although it quickly got up to pace, it was still kind of boring to me. I think it would've been better if you added different colors and types of blocks, made the music more exciting, fast-paced and more than a simple beat, and added more things to put credits into.