It's a pretty fun game! Although, there is a glitch for whenever you decide and try to play another level in sequence; it currently doesn't respawn you after the first time you go and die on the second level. It kind of forgets that you have a new checkpoint, and you die constantly to where you're standing.
Other than that, it is fun. I have seen that a lot of the shoes in Level 3 seem to not be useful, though, as in, you'd rather just skip them, and not use them, which I'm fine with, but I do wish the Slow Fall boots had more use.
In level 1, there was a large spike pit with a box in the middle, and two moving platforms. I ended up keeping the spike shoes, and skipped the jump shoes, and was hoping there could be another way to solve the puzzle without using the jump shoes, but got sad after getting to the top platform with precise jumps that there was no way around, and had to go back and get the jump shoes I passed by.