A bit too simple, but nice nonetheless!
Just two things to say:
(1) the arrows are a bit difficult to distinguish, especially when they appear fast. You should probably make the head more prominent/salient, or perhaps use color coding.
(2) the first two tracks are rhythmically very boring. They are just quarter notes (except for the few at the end). Too uniform. You've done much better on the third song, adding pauses and eighth notes and so on, it would be better if the first tracks had some of that too.
Good job regardless!