Gorgeous pixel art, cudos to whomever created that! The game feels very polished for a week of work so great job! I really enjoyed the platforming puzzles where you had to switch worlds mid jump and such. As somebody else noted, the jumping felt a bit off, I think it was because you could move a lot to the sides in the air which made it hard to be precise with the landings.
Great job though and good luck in the game jam! :)