Simple but amazing visuals with pleasant to ears music music.
The level design isn't all that complex but does push your scale changing skills which makes it satisfying to play. This especially comes into play with vertical scaling as you need to be taller to jump higher but cant make it past the ceiling unless you shrink mid jump. Horizontal scaling however seems to mostly go unused. Might be an idea to explore levels with long gaps you can't jump over but can bridge over when wide enough.
As a small gripe, the controls could do with an invert option where it swaps wasd with the arrow keys. My brain is just hard wired to associate the left hand with movement and the right with actions and I kept dying due to mixing up the controls.
But otherwise this was very good.