Speed. Stacker. Play other games. Free Games For Your Website. Play. How to Play. Credits. Game by Adam Rocks. back. CUP. Stacking. The Point of. Do you have the patience and skill to stack all the cups? Find out in this challenging game!. Stack and unstack the cups by typing the. characters on them. You can type the. characters only when they are black. Play Again. Home. Press the ENTER key to. Find documentation and support to get you started. Learn To Type Home Keys. Get your games in front of thousands of users while monetizing through ads and virtual goods. Review By Two Talkin' Treehouse Hot Videos PGTV New Videos All Videos. Register now to save your earned badges, chat with other players, and share your progress with your friends. Typing Practice — Colors.