Cute game! I couldn't solve it, but I really enjoyed figuring out what was going on, and then how to accomplish goals. Very nice!
I would have liked some kind of world map so I didn't have to visualize the graph of the world in my head. Or even just some visual indication nearby the doors, like 1 changed tile, to remind me of where they lead.
Also, platforming challenges got a bit aggravating after a while. If I fall down that grey stone pit one more time... haha. It makes me wonder if the game could have been implemented as a top-down walker instead of a platformer, or otherwise remove platforming challenge. But I definitely understand you taking inspiration from those two games.