You may know those unlock screens from your smartphone. This kind of game is nearly the same desing to do, just try to find the correct Code to break the lock. The Solid Dots shows you if you find one correct unlock code. You need to find all in correct order to win.
How to play:
Just move your Mouse over the screen and try to paint to unlock code, like you would do on your smartphone. Correct Dots appear solid, and right Dots but in wrong direction appear hollow.