Thanks for your comment!
I was talking with a fellow jammer and they did bring up the difficulty of the game and how knowing everything about your own game design makes it hard to create puzzles that are in that "easy but not too easy" balance. I've had zero feedback on the game's difficulty before the end of the jam, so it seemed fine by me, and I was wrong! I'm sure I'll get better at it over time.
Also concerning the speed powerup, while programming it I noticed how "floaty" the controls for it were, and I did quite enjoy this since it added a bit of unexpected depth to it. However, I do understand that my game was already hard to begin with, so that probably made it even harder. :P
Thanks for playing my game though, I appreciate your feedback!