I enjoyed what I could play (which was not a lot, given my various skill deficiencies,) and the effort you put in is clear, but I felt like I spent a huge amount of time watching various transition screens (the level title card when I restart, the spinning globe, etc.) It really compounded my annoyance at dying to have to watch all that over and over, so being able to skip those bits too would be really nice.
The only bug I found was that when you load a save, you have to watch the door in the middle open and closer before you can start, even though you load on the far left of the hub.