It's just a cute lil game. Not the kind of stuff that wins jams but it doesn't need to be : )
Enjoyment: It was fine. Just a relaxing game. The puzzles were well thought out. However stacking boxes was always a little awkward. It kind of felt like I was using the game's engine in a way that wasn't intended, if that makes sense.
Creativity: Fine too. It wasn't a bad interpretation, you definitely can't say it DOESN'T fit the theme. However I expect a lot of games to have that same twist of your character changing sizes.
Style: Good! I can imagine a winning jam entry looking like that. Very polished. I like how it's made of pretty unappealing colors (on paper) like bog green, yet it doesn't look gross! I can see you put a lot of effort in that.
Overall, it's fine. It's the textbook example of a "good jam entry". Doesn't really do anything beyond that but I like it for what it is. I hope humanity isn't in danger after the ending.