Scratch

This isn't my game, but my friend's.

It's pretty awesome.  I helped out with it and here are some of the features:

It's 1S1S!

It has three difficulty levels on a 99 square grid: 11, 21, and 30

It can clear a larger area than just one block (most minesweepers on the website only do one at a time)

Has cool sound affects

The numbering system is perfect

So check it out and click love-it!