Pretty cool game, nice concept! Very good color choice, and I liked the relaxing music.
Took me a bit to understand how to spot the "invisible" platforms, but once I did, it was pretty straightforward finding the way. I think I managed to complete some levels in an unintended way by jumping high enough off the platforms below the door, instead of going through bottom edge or platforming.
I ran into a strange bug where sometimes, pressing Space doesn't make the character jump but instead only plays the jump sound, that was distracting. Coyote jumps would've been nice too.