Interesting game!
I got stuck because of the random level generation when going left, not really sure what to do after that point. Sorry!
Also I has able to hold down space and keep jumping kinda.
I think it would benefit from a better jump mechanic and perhaps more enemies spawned across the map. Whenever a player gets hit. They could re-spawn into a new level to try again, so like one chance.
Check out my game if you have the time: https://itch.io/jam/gmtk-2019/rate/461850