What an excellent game! I had a WHALE of a time. I ask for more levels (Although I couldnt figure out level 8, what's the solution?)
Stuff I think could be cool/use some improvement: The maroon element is a bit finicky to click, because it has 4 small buttons on it. I also wish there was some way to "keep" the music I made in each level. So all the tunes from levels 1 to 7 could somehow combine to form a small tune - it would feel rewarding to me.
Honestly, this is a top-notch submission. I enjoyed it thoroughly. Kudos!