Could use a bit of work
While it's a nice concept, I noticed some things that aren't "bugs" but could be changed.
A) When you press down to make the blocks move down, you should be able to release it and have the block start moving at normal speed again.
B) The beat detector is unforgiving. It seems that if you aren't precisely on the beat, you don't hit it; no window for error. This is the kind of game where you get into a rhythm and once you miss one note, you're going to miss the next couple till you can adjust.
C) You shouldn't be able to go into negative points. Partially for the reason in B). If you miss one note when you're in a rhythm, you're going to miss the next few and you can end up digging yourself a hole before you even make a line.
Oh... and I gave you 10 for humour based solely on the fact the default name for the scoreboard was "Illiterate" and you spelt Rhythm wrong in the title.