Nice work making a 3D game for a game jam, and a really good one at that! The puzzles were all great, and they ramped up in difficulty well. One thing I liked that I don't see in a lot of games is the minimalistic and hidden tutorial. Instead of giving me a massive block of text telling me how to play, you gave me the basics and let me play around with them to solve the puzzles, which makes it feel so much more rewarding.
And, hey, gotta love anything inspired by Portal.