You need to make it so that the game waits until the player jumps for the screen to move, or I could just stay at the bottom. I think that it is possible to give it some sort of story and upgrades to keep the player in the game other than to beat their score
What you need is something to keep the player interested. There is no story, and I saw that the monsters couldn't kill you, so there is no point to them unless you add some sort of story, or leveling system.
I have more levels on a different file, click my username to see it.