I love everything about this game - the difficulty is insane but when you finish a level it is very satisfying. I made it to level 3 and boi it is tough as hell. I think there may be some minor improvements on the mouse controls but I also don't know if my mouse just sucks.
I think this would be an amazing Steam game! I'd love for you to flesh it out more and make a full game. As far as fitting the theme goes, I think it does but on a minimum level.