I like how you can strategically plan to use your ghost around certain obstacles. I felt really smart activating it before jumping into a pit that I couldn't see the bottom of. When I realized it was a spike pit I felt like I was being rewarded for using that mechanic intelligently. I did however struggle with the controls quite a bit. While they are tight and responsive, they felt a little awkward for me. Having to press both forward and down while simultaneously clicking was a lot for me to write to my muscle memory and I had to consciously think about the controls every time I made a jump. But overall, some really good level design! Great use of checkpoints too. I'm impressed to see how much polish your game has for a game jam game.