Totally up my alley gameplay wise, robust implementation and the characters, UI and animations are all excellent. The timing on the rhythm game is pretty tight, which is OK imo, but there's not a lot to help the player stay on time. Unless I'm totally off, the notes don't seem synced to the bgm's tempo, so all the player can rely on is visual cues. Keeping the notes at a consistent tempo and only going down to half and quarter notes, or adding a visual metronome, would have made the gameplay less frustrating without making the margin for error wider.
It was daring to try this within the nokia limitations and very cool to see your implementation! Great job overall!