The game was fun BIG kudos to make only 3 levels, a game don't need more than that for this jam (refering to other games that creates too many levels that players will never see, so well done)
The gameplay is fun, I enjoyed scaling down and up the level to traverse
Here's some points toward improvement: Allthough the style was good and fitting for your game, it does lack some polishing and it looks bare-minimum, which I'm fine with since it's for a game-jam but it does subtract some "style" points sadly - Especially since there's so few objects you could have made them more visually interesting, maybe even some variations to them.
Then the actual scaling: idk if it's a bug or a feature (as a programmer myself there are never bugs, but features imo:P ) but anyway, you can scale things indefinetly, in both directions. Idk if it was intentional that when you make them tinier then "supposed" to, they become a black hole lol (if it's intenional then It's awesome)
On the other hand, when up-scaling you should have put a max-scale limit, first level I just made the first object ridicolously large, and when I got tired of enlarging it I jumped down next to the goal -basically skipped the whole level.
Over-all this is a good game and your game fits the theme good. Well done! =)