When the 1 launches, can you hit the ` key (commonly referred to as the ~ key, but on a US keyboard you have to hit Shift to make ~, so to me that makes as much sense as calling 1 the ! key... anyway, if you dont have this key, try F12 instead) and have a window come up in the game? Says Console at the top of it. If so, then look through the console, somewhere near the bottom of it, for anything that looks like a problem. It should be relatively obvious.