This program gives an opportunity to play a Shells game with your friends. Only multiplayer mode is supported, so you will need 2 devices: one for thimblerigger and another one for the victim. Devices should be connected to the same WiFi network segment. If you are thimblerigger - start the game, wait for the victim, put ball and few cups then move cups. If you are victim - connect the game, watch and guess. Source code gives an example how following techonologies can be used: * Android NSD for device discovery * OpenGL text rendering * OpenGL ball rendering * OpenGL shadows rendering * JS-Collider: Java network framework <a href="https://github.com/js-labs/js-collider">JS-Collider</a>