This is a cool game, I like the shape changing mechanic in addition to the size! Puzzle games are hard to do on such a tight timeline but you have a really good start here!
I think one thing that would improve the game is a little bit of coyote time on the jump. I didn't get stuck long, but I found this jump in particular to be really tough. I was able to do it both by not changing size and changing size mid jump with some effort however.
Awesome job!