How to play:: Click on one of the buttons in the playing field
to subtract 1 from that button's value,
as well as from the values of the 4 surrounding ones.
Objective:: Set all buttons to '0'.

Example (a click on the "2" in the middle):

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Things you should know:

As soon as you click on "New", a new game starts.
The score starts counting down from 1000.
The quicker you finish, the higher your score will be.
"Undo" and "Hint" as well as using more "Clicks" than the current difficulty setting requires,
will all make you lose a couple points.

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