I enjoyed this one a lot. The art style was a great choice, the shape design felt vintage inspired while also working to the strengths of pixel art. The writing was fun and well paced. This reminds me of the Nitrome games I grew up playing.
My only suggestion for improvements would be to cut down the amount of instructions in the beginning. The game was smooth and intuitive to play, but seeing all the buttons and abilities right off the bat made it seem more complicated initially. Giving just the basic movement to start and then adding items over the course of the levels could make it easier to get started, and give a greater sense of progression throughout the game.