Some very nice cutscenes, just the transition from the splash to the main menu was super cool. I think the main thing I would change is not to be sent way back to the beginning as my reward for beating each section, some shortcuts would make that actually interesting as I can now take new paths.
I see a lot of comments about the controls, but I think it made sense. I think the only main confusion is the tutorial mentions WASD to move, rather than Arrow Keys. Trying to use WASD and ZXC is a nightmare for sure, but Arrows and ZXC is totally fine.