It is a simple game. When you start the game a random color either red, green or blue falls towards the big solid colored rectangle. You have to press red, green or blue color to change color of big colored rectangle before the falling color falls all the way. The game gets progressively hard and you will have harder time changing to right colors. You can also turn on hard mode if you want to have even more of a challenge.
Finally after the game is over you can choose to save your score online. If your score is top 10 highest ones your name will appear on the scoreboard of the game with your score. If it is not in the top 10 then it will be saved online and will appear on game's website(still in development).
The game's website will be online soon.