Cool small puzzle game. The art is outstanding, especially for a game jam game!
Gameplay mechanics are cool, but I feel like they could be taught to the player better. I finished all levels without understanding how the door he teleports to is chosen or which direction he runs at after going through a door. I just removed all doors I put before and quickly put doors where the next part is. I think it would be less frustrating when you fail and more rewarding when you win if the player understands what is going on.
I haven't made a puzzle game before, but I think they usually teach each little quirk of the game logic in a small level where you can't proceed unless you understand it. Longer levels don't encourage trying out how the mechanics work since you lose progress.
But that is honestly nitpicking since I had a lot of fun while playing and wanted to play more levels! Music fits the gameboy vibe perfectly as well.