Uncover tiles by clicking on them - if there are one or more mines in the adjacent
squares then the total number of mines is shown in the square. Using these numbers,
together with your skill, judgement and a sprinkling of luck, you should be able to
determine the locations of all forty mines.
Mark a tile hiding a mine by dropping a flag on it (click the tile while holding
the [Ctrl] key). You only have one flag per mine so be sure!
You can remove a flag or place a question mark on a tile (if you're not sure enough
to drop a flag) by repeatedly clicking on it while holding the [Ctrl] key.
The game is over when you either set off a mine, or all tiles have either been flagged
or uncovered (i.e. you have found all the mines)
The number of mines remaining is shown in the status bar of your browser, together
with the time you have taken so far.
