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This is a card-based version of the Tower of Hanoi game, which contains 2 sets of towers. We also offer a single-tower version of this game.
The goal of the game is to place all cards in sequential decending order in a single stack from the 9 on down to the Ace, and to do it once again (hence the word Double).
Cards are initially positioned with 3 cards in each of the 3 columns.
Only one card can be laid at a time and a card may be laid on any card which has a higher value.
The right side of the screen shows your moves, level (there are 3 in total), and current score.
Underneath these data points there are 6 buttons: undo (which can be used up to 3 times), restart level, pause game, full screen mode, sound control, and music control.