Click the boxes but if you land on a box with a mine in it you lose. Click space while hovering over a mine to put a flag on it. The numbers on the tiles tell you how many mines are next to that tile (including diagonally). The top right number is your score and the lower the better. Have fun! You have to refresh the page to restart and I don't know how to fix it. If you don't refresh the old minesweeper game box will still be on the screen.