Almost any lock can be opened, and an experienced security guard will confirm this to you. You can also try to open the lock at each level by selecting the right combinations from a set of colored balls in Combo Color Unlocker. Place the balls in the cells; if the ball is in the correct position, it will be surrounded by a green circle, and if the ball is in the wrong position, it will be surrounded by a red circle. Take this knowledge into account and at the next stage replace the position of the balls. You are given several attempts to select a combination in Combo Color Unlocker.
