Tap to place tiles. If a tile is adjacent to the space you tapped, it will increase by 1. Match the board to the solution at the bottom (red=1, green=2, blue=3, purple=4) Good luck! Beta version - no high score board yet. Everything else should be working properly. 20 levels. The square buttons are: undo, reset level, go to menu. Now automatically saves where you were when you quit!