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About game
This game is a logic puzzle with numbers, in which you need to decrease numbers to get a number equal to zero.
The personal record is the minimum time to get zero.
The game has a leaderboard.
How to play
Choose a number if you want to decrease it.
When you choose a number, it decreases by one if there is the same number to the left, right, bottom or top.
Numbers equal to the chosen one are removed if they form a group associated with it.