I'd suggest specifying that you can double-jump. I didn't realize you could and so I spent a bunch of time figuring out how to complete levels while hitting spikes fewer than three times.

Absolutely loved the visuals! The shaders (I assume you used shaders) and postprocessing effects you used to achieve the digital look and the like warped faded look (when you shift to a ghost) were excellent! and the sprites + pixel art was minimalistic and very effective! 

I agree with what's been said about wanting more use out of the ghost mode because its a wonderful effect and a really interesting addition to the platforming gameplay- it would be really cool to see it explored more! 

Otherwise, I didn't really run into any bugs besides the frustrating hitbox of spikes on the top edge of walls. This game is very well polished and finished and it's definitely something to be very proud of especially for a  short gamejam entry!