Prented that the Open challenge plays randomly on a candidate
image size is expected to be in px in html5
test home page in ie8
...Pretend that the player fails when playing on a cell with no bomb around displays 0 in the cell ; empty is expected
...Pretend that passing the zero challenge means to let empty the text of a cell that has no bomb around it
The Zero mine around challenge exists and is set as level 3.4 :)