Really cool game I appreciate you guys working in 3D too! I would say the strong points for me that I noticed were the mechanics, puzzles, and I also just thought the music was pretty catchy. Also really cool that you made a lot of levels, I only got to making 3 in my game lol. I think the main issue for me was that the game was kind of lacking an environment, I mean I know you changed the skybox color but I guess I would have liked to see a little more, like more custom objects for each world and maybe a closed space that you could decorate, rather than like falling off the island thing.
Overall you guys should be very proud and I thought this was a really solid entry.