Note: pls don't read, you need to sleep :p
Hmm I think you should have hover sounds since there's a hover animation
Also HOLY WHAT 15 is massive
Oh btw +1 for random shades
Although it's not very noticeable
Also the dot on the music note should be 1. horizontal, 2. wider, 3. shorter IMO
Maybe make it two quavers, also since it's not music at all it should be one of those speaker icon things IMO
Also since this is pretty Minesweeper-like, maybe have some way to flag something (with like a question mark maybe, or just a red (?) mark)