There are some movement glitches
I'd like to give you a full 10 stars, but unfortunately a movement glitch made it too difficult on level 23, and IMPOSSIBLE on level 24. In level 23, often when you are moving to the left, it will continue moving with you unable to perform any other command. This results in me running against a wall for ten seconds, unable to jump or turn around, which usually results in me getting killed.
But after COUNTLESS attempts and a bit of pure dumb luck that the glitch didn't happen, I finally made it to level 24, only to find the level begining on a forward right drop, instantly falling off of the cliff with no chance at landing on a surface, and dieing and respawning in that same right forward drop every second and a half. This forced me to escape to the main menu, only to discover that I could not continue from where I left off.
This similar glitch happened in earlier levels, but wasn't as prevalent until the final stages.
I'd like to finish the game, as I only had 2 more to go, but unfortunately this bug makes it unplayable in the final levels. Fix the bug, and I'd say you have an amazing game.