It need some more work. And even if the grays levels are upside-down, it lack of relation between them. Perhaps if the coins were "shared" between them and you could re-fall from gray-ones to light-ones ? The important thing is to practice, I made my first platformer for this Jam, and there is bug too, but i learn a lot. 

The game was pretty buggy and you could jump in the air. The jump also felt weird and you could end up floating in the air. I don't understand how this relates to upside down.

Nice simple game. I enjoyed the creative key mechanics (shoutout to all my vim users). I think the physics could use some work. I had to spam the left and right so i could go upward far enough.

Well, what even is this?