I don't think I can say anything that hasn't already been said, but... the character sprite is amazing and super funny, the wall crawling feels like a lot of fun. The only especially problematic parts I noticed with it were instances where you get stuck on corners trying to round the way back up, but otherwise it's pretty satisfying. You can also mitigate those a bit by doing double jumps, but obviously that's not ideal. I do agree that the character moves way too fast (and I was also a little confused when the text told me about the run button when I started in run mode).
Also fwiw, this is a pretty competent presentation for a movement test, the cheats are very nice for testing and there's a thorough amount of things to test on. Not sure if you normally do this when working on a game but it's a very solid starting point for whatever you do end up making for sure.
I really hope to see the game she's in, I imagine its going to be a lot of fun!