In boulderdash, (I was a master when I was 12), you can push boulders into open space, support them with your head; but if they fall on you, you're dead. If you let one of those flashy things touch you, you're dead. [lock, stock] infact you're going to have to work very yard to stay alive[/lock, stock]

I also found this
http://abandonware.universal.av7.net/1985/Boulder_Dash_2.1985.exe
runs in dos, scary