You try to figure out the controls and find a way to clear the screen.
To make the water move, tilt the device. To win, get all of the water out of the screen.
To make the cube grow, tap. To win, tap repeatedly.
The red arrows avoid your first touch. To win, use your finger to lure away those red arrows to off screen.
Dragging the screen will move the light and camera. To win, clear all markers using the shadow.
Dragging the screen in an axis will move certain blocks horizontally. To win, form the FJ symbol with a ring outside of it.