Sooo... basically... the space key controls the scratch cat which has the movement of geometry dash ship and the up arrow controls Nano which has the normal flappy bird physics. You get 2 score per second when both are alive, but when one dies, the pipes speed up and come at faster intervals, and you only get 1 score per second. The edge kills you as well.
idk what to put here but I guess thanks Flappy Bird and Geometry Dash