Super cool, and excellent level design! Love the little tutorials after each new gem, and having to combine them in different ways. My favorite moment was when you needed to combine ice and fire to jump from ice blocks onto more ice blocks above.
Other game design features I appreciated were the generous hitboxes, and how forgiving the swinging mechanic was. The only thing that took some getting used to was the looping gems, like having your double jump ability switch buttons back and forth, or accidentally using the speed gem and running off a cliff lmao.