Very cute entry!
I love the look and feel of this game! I hope that you add more onto it because I feel like you have a solid base here, either to do an actual Metroidvania, or a platformer, or really anything from this point!
The controls are very solid, and I think the level design is very good too!
Only thing I saw is that there was a seam between two textures/blocks pictured below. Also, at least on the main menu, the X in the top left does not seem to do anything.
