Good job! I enjoyed playing it; I couldn't finish it because I cannot seem to jump again from my past ghost to get the boost (lev. 10, W input doesn't work while ghost is airborne? Or am I doing something wrong?)
Anyway, chill music and fitting sfx, simple but nice visuals, clever level design. I don't know about the character size being too small, at first it felt like it was, but then the game totally worked.. maybe it's just an aestetic thing.
Little criticism: I'm not in love with the K key to "loop", I ended up using my right hand just for that and it felt a little weird position for my hands. Maybe shift? Maybe it's just me.
Very cool experience, I'd play more of it if there was.