Gravcontrol is an exploration into using Arduino to control a Processing app. It sends values of the LDR (photoresistor) and Potentiometer through the serial port to control different aspects of the game. The idea is to control the amount of gravity force with the LDR, meaning that when there is no light, there also is no gravity. The direction of the force is controlled by the Potentiometer. The mission is to collect as many “stars” as possible. Everything including the physics and the soft-body behaviour of the ball is done from scratch without the use of libraries.