Interesting concept!
The last part of the level (where we had to take the cubes and send them to the world below) had some bugs so I had to do the all over again a few times.
I wish there was more content, but it is understandable as it was for a jam.
I think an interesting twist on the game could be a wall of death rushing towards both the characters so the player has to quickly complete the whole level, that would make the game more challenging!
Overall, an amazing entry to the jam! Great job!