The design for the MC is fire! What can I say, I love office ladies with eye bags. The spin mechanic also super cool the execution is fun and the payoff is also very nice. Love the change in sprite when you are spinning super fast (I wanted to do it for my game but gave up half way).
If I could add a single thing it would be a invulnerable state to the character when she does the dash or when she is getting into the elevator. Got killed multiple times trying to change levels or dashing against enemies. Was it hard to setup the procedural map generation? I feel like I would spend an entire day just to implement it (if I'm lucky and don't fuck up) it's very impressive.
I would definetly put in a couple more days of work into the game you will end up with an excelent game!