Overall Enjoyment: The puzzles were quite easy but that is fine for a game jam, I especially loved some of the platforming levels, the bounce pads felt very fun to use.
Use of Theme: It wasn't a very creative use of the theme but it definitely worked for your game and made some interesting puzzles.
Gameplay Enjoyment: Considering that it was a main mechanic It didn't feel that the universe switching ability was involved enough, that being said, I loved the puzzle where you figured out that you could bring the blocks with you when you switched dimension.
Audio: Could really benefit from a sound track, but the absence of one didn't affect the game too much.
Visuals: Amazing that you managed to create a 3D game with good models in such a short time frame, Well Done!
Creativity: Gave me massive portal vibes, and I loved it, thought the mechanic was very interesting.
Really well done, I enjoyed the puzzles a lot, congrats on submitting :).