Good job introducing the controls and interactions with items with the on-screen pop-up text. This really helps the players learn the game and what to do!
I could tell a lot of work was put into this one, and it turned out great. A couple small complaints, though. I didn't like how far I had to go into the blue locked door area before finding the door. I traversed a lot before knowing I'd need a key I didn't have and then had to backtrack a lot. And then besides that, I think the edges of the screen where the player can transition need to be visually distinct in some way from those that the player can't (if you just make the ones you can't into walls, it solves this problem). There were a few times where I thought I was going to walk into another screen, but it was just an invisible wall.
But overall very fun platformer!