A pretty decent platformer game with responsive controls. I like you character sprite, kinda reminds me of The Knight in Hollow Knight.
The level is quiet easy and lack the variety that makes runners like these fun. Maybe add different platforms or platforms that followed different rules. In addition to that, make sure that your platforms aren't too close together, as it looks weird and doesn't offer anything to gamplay. It might be a good idea to add sound effects to your game and add animations to the lava and other elements.
Otherwise, not a bad attempt at making your game. Keep it up!
P.S OMG you have a quit button. Nice!