Pros: Infinite Level generation (forward and can return to start)
Cons: No clear goal, No visible progression, Is that a collectable to the left (****I can't reach it D:???)
Suggestions:
Make some sort of goal (Distance/collectables/anything)
Visible display of progress to or increase of goal (Ex. Coin counter that goes up forever)
Jump sfx - background music
Jumping animation (Squish the player a bit when they land etc...)
Some sort of collectables(for jam Focus) or make the player go so far right then return to the beginning (for there and back)