Very nice way of working with the theme. I like the concept a lot. Unfortunately, I got stuck on the second level already. It took me a lot of fiddling to get the block into the deep part and then when that didn't actually solve the puzzle I didn't have the patience to continue. I do realize my patience is lower than usual at the moment, so that's probably a part of it too. I did get stuck in platforms a lot, but after not understanding it at first, I did always get out pretty quickly after that. Oh, and keeping the portals in separate areas in the first level was a great choice to help the player understand the game!