A bit confusing at first, but when you get a hang of the controls and mechanics, it's a pretty fun entry for the jam overall.
As a reference to future players, since nobody seems to check game descriptions during jams:
-You can swap between the 2 worlds with right mouse button or left alt
-You complete a level by standing on red circles in both worlds
-Buttons with white borders can be activated by the player, and black borders by cubes
-Blue circles teleport cubes between the two worlds