Fun game! Very Celeste-esque. Cute graphics, well designed levels and smooth movement made this a pretty good short game.
Two pointers I had is: The leniency on going out of ghost form. I've had quite a few times where I died and I felt like I was within bounds. Movement is fast, so it's fairly hard to do it accurately, for me it was mostly continuing to try to succeed.
And second is gravity. Please put a max on downwards velocity. This made the final level extremely difficult.