A good game for people who want to solve puzzle game, simple but worth thinking This game include 2 game modes : time free and time challenge. Time challenge is for testing one's speed resolving puzzles, Hundreds of levels with possibilities to add and remove disks at any time, up to 18 disks and not less than 3 disks. A timer is displayed for both modes with a high score label indicating last high score recorded. And of course the view can be freely adjusted to fit the screen dimensions