A really cool and innovative platformer.
Pros: to me, this is a near-perfect jam entry, and if you had been able to spend the full week on it I think it would be a perfect 5 across the board. It uses the theme in an unexpected way, it introduces a completely unique mechanic, it takes just enough time to fully sell that mechanic, and it's just challenging enough to feel like a game. The graphics are simplistic but they work for the design, the gameplay is smooth and the platforming feels decently polished.
Cons: some backgrounds and graphics beyond just default shapes would have been nice even if they were still very simplistic, the need to jump when you land isn't explained in the game anywhere (it's explained on the page so it's not a huge deal but some instructions/tutorial would have been nice), I really wish you would have had time for some music and SFX
Overall given you only spent one day on it this is a hella impressive entry and I would love to see what you can do with a full week.