First time I played the last door wouldn't open, even though I had the key. I restarted and it opened. Restarted again and I figured it out: dying causes you to lose the key even though the HUD says you have it and the level doesn't respawn, so here's some bug for you to fix in case you ever feel like working on it again. Oh well, I'll commend the art, good pixel art is always commendable and I'll say that the controls were nice enough. Usually a wall jump launches the character away from the walls, which usually allows for combinations with other movement options (like chaining wall jumps from two walls that are facing each other, or dashes) but your game doesn't really have any of that, nor does it actually requires you to wall jump to complete it. You can't also control the jump height of your jump, which is usually important for platformers but the level design also didn't really required fine jumps that much, I didn't really needed it but I noticed I couldn't do it. Overall, good addition to the jam, you did a great job!