Hello Andy! Thanks for playing and giving feedback!
I've updated this game based on your experience. Now we don't have background scrolling anymore and I think this is very far better than before.
I've adjusted the obstacles positions and velocities too... Now they are somewhat randomic. Think you'll see it better on faster stages.
I thought this game for being a simple one. Much of its mechanics inspired by the Trex game (do you know it? The internet offline game...hahahaha).
About the physics... I made it by myself. P5play don't offer a jump physic function or something like that... xD
Congratulations on the score!