Innovative, but needs polish and an endgame
I think it would be better if enemies were a little more challenging the higher your altitude, as it would create an actual reason to stay lower.
There needs to be more of a reason to use the fireball. It's a waste of points, as it stands, you're better off focusing entirely on the kick.
There's more polish needed. The way that the obstacles scroll onto the screen and explode looks terrible, frankly. Even worse, bouncing off of objects is barely even part of the game, so it's there looking terrible for no reason.