This game creatively asks you to control two people simultaneously. You should make them cooperate with each other to solve many puzzles. Different from the requirements for controlling two people at different times, this game requires you to grasp the movement of two people, which tests computing ability of your brain and coordinate ability of your hands and eyes. This game consists of three chapters. Some new elements will appear in each new chapter, providing new challenges and pleasure for you in solving puzzles. The levels become more and more difficult. At the beginning, some simple puzzles help you to be familiar with the game and all kinds of new elements. Then, the level will be difficult increasingly, especially the last few levels, which is a huge challenge for your brain. This is a perfect puzzle game for those who are willing to use their brains. You can experience great pleasure that other games can not give to you in this game.

Go to: http://store.steampowered.com/ and download STEAM client Click "Install Steam" (from the upper right corner) Install and start application, login with your Account name and Password (create one if you don't have). Please follow these instructions to activate a new retail purchase on Steam: Launch Steam and log into your Steam account. Click the Games Menu. Choose Activate a Product on Steam... Follow the onscreen instructions to complete the process. After successful code verification go to the "MY GAMES" tab and start downloading.