Nice work on the music and sounds! It's really great. The visuals are also very nice.
I had some difficulties with the long jump. Holding space for too long seems to cancel it, which feels odd. Also, while using colors to indicate the height of a pillar is clever, it took me a while to understand it. And at several time, I tried to jump from a yellow pillar to a blue one, but just at the same time it becomes red, making the jump fail. It can be a bit frustrating.
But it was still fun to play, and figure out several strategies to move around and shape the stage was enjoyable!