You did great job. I enjoyed it.

I appreciate your unique approach to the theme, clean presentation, took me a little while to catch up on how the planet was growing. 

Reading the comment below, I figured out what the "Growth" part was. I like the idea, but it's hard to notice since it feels like there was a glitch and I did not notice that things did grow. Having some kind of animation that grows everything smoothly. like a scale lerp might be great.

I like the idea for the growing levels. It did feel a little weird the first time I saw it happen, as I was falling towards a platform that suddenly jumped to the left.  It might be better if you could keep the player in the same relative position as everything grows. This could be an interesting longer game.