Hi Jack,
This beats my first game that's for sure! I completed the training twice. First time I got stuck in a bonus area... at least I'm pretty sure I was stuck. I jumped for the ending platform. (I should have seen that coming honestly lol)
Anyway, I noted a few things while playing..
I was a bit annoyed at how the tutorial text at the top of the screen just disappears forever after a short time. I missed I'd say 1/3 of it during my first playthrough and had no way to make it appear again.
About the movement/controls, I think it's good when on the ground and in the air. Sliding is nice, although I wonder why I can't do it indefinitely. What I'm having difficulty with is running on walls. It very slow. I think I'm supposed to jump when running sideways to go faster, but half of the time I just fall. I also never managed to get through the wall jump + lasers obstacle the "right" way. From what I can tell, there's no good way to jump away from a wall. I always run out of jumps/dashes somewhere and die.
About the camera, I think it's as good as it can be. I like a free camera that doesn't get obstructed.
I hope this helps and good luck with your project!