with a tiny
--- Slow speech. Sounds as if you needed a rehearsal or maybe another take.
+++ I like how here you're forcing us to sorta play the notes.
--- The keys don't really approximate a piano or any other instrument. I mean, we're practically just learning to click in a certain position - not even really learning the letters (which mebbe you can't do anything about...)
It'd be better if you had us play them on an piano graphic. Or maybe instead of the mouse, use the keyboard (maybe middle row, each button represents one key).
---- Last level is terribly glitchy. After pressing each button, it jumps forward a tiny bit (different each time, so impossible to compensate for).
--- Window within which to play a key is too short.
==
Again, I like your aims but not your execution. This one though, with a tiny bit of work, could have been much, much more solid. And also fun.