Hey, good work on making this! A few thoughts:
The art was solid, looks-wise it was pretty cool! Also, good music.
The menu was tough - I had to press enter many times before it let me into the gameplay (though perhaps some of the menus weren't complete which is understandable).
Yellow notes (perfect) didn't make me feel as good as green notes (good). Also, an audio indicator for note hits or misses would've felt good.
The tutorial felt a bit long.
Excellent work on making this, I know it can be tough managing time. Keep it up!