The game is a bit repetitive, 

You can't really tell where you are and the progression of the game.
But the sound design is great and I like the vibe

I will be sincere, the gameplay is very minimalistic and repetitive.

I think given the time-limit and all, the art is pretty good and polished. I do miss more fun game-mechanics, so with more time I'm sure you would have created more interesting mechanics, like something that can damage the player, or push the player down?

As for fitting the theme, you scaling upwards is the only element, and it's lacking a bit on that as well.

I think over-all though it's a decent game for the game jam, you should be happy with what you've made.

Interesting take on the "Scale" theme good job!