Tetcolor for Windows - Version 2.5 It is a single-player desktop game that challenges you to rotate falling blocks to line up three or more of the same color. Move too slowly and the game board fills up to end the game. The game graphics are great and sound punctuates the game action. Hints are available, high scores are recorded, and an honor roll keeps track of the family experts giving them nice funny icons. The game has built-in midi player.