I feel like all of the mechanics introduced in this game would work greatly in a metroidvania / more open platformer (Especially the dash, you could make an entire game just with that ability). I was not able to finish it since the last level lags like crazy. (I have only played the browser version so that might only be an issue there). Love the artstyle and the story at the begining.
Some small nitpicks :
Taking damage should give more feedback.
Half solid platforms should have a different color than normal ground so they don't get confused with it. (The firs time I played the second level I didn't realise there was a half-solid platform so you could reach the fire ability).