Rhythym?
How is this a rhythym game? There is music and corresponding keys that make music noises...But the keys and the noises you make have nothing to do with the bg music. its sets a tempo that the crap falling doesnt follow.
My suggestion:
Give the bg music some meaning, make it so when the birds eat the junk it add a line to the music. Attempt was okay okay, music was okay. Just bad gameplay i guess.