There is a extradimensional space in your phone! And your are the host of that world.
By rotating your phone or swiping down, you can control the gravity of the strange world.
A girl broke into this world, the lost girl was scared and only listens to you, if you swipe upward, she jumps,if you swipe leftward or leftward, she runs.
Help her escape from the world. Youre the only hope.