I didn't like the game, to be honest. Your attack doesn't work, the concept is unclear. The art style is also lame.
Since this is a platformer, as a suggestion, you could make a jump with different takeoff and fall speeds. Such a system is now in many games. For example, the games Mario and Hollow Knight. I also advise you to work on the UI component.
Don't be offended by the criticism, I am writing it because I myself would be glad if they wrote to me honestly what they think. It helps to grow. Therefore, I wish you good luck in your endeavors