Fun game! Whatever feedback was already given pretty much what I think.
I could just say maybe the mix (balance) of the sound and music can get a bit better, specially when you pass a stage, the main music (the nice piano old school jazz one) could maybe fade out a bit more and then come back, giving more space to the Level Cleared Music. But again, I am just stretching a feedback as I think for the time given, this game was really well done!
Gr8 Job!