This was very nice, a huge level to explore with multiple implementations of the main mechanics you made, picking up the crystal, the dash, and the expanding heads. I really thought I was finished only to be greeted by more difficult platforming sections!
The controls sometimes were a bit floaty, and jumping too soon when on the heads sure gave me some frustration, but they clicked eventually. The last dash section, where you need to move from the head to reach the platform where the crystal placement is, is one I had to retry several times, as it's very sensitive to the head being as high as possible when you make the dash. I feel placing this one a bit closer would have been nice, as the challenge of the section was not really in that last jump.
Really loved the tileset and sprites you made for the jam!