Last time I played this game was probably in somethign like 1987 so I don't remember a whole lot of it. But basically here's what I think you did: You climbed ladders or something on the outside of a building maybe. Possibly 8 "levels" (by that I mean that there are 8 horizontal lines that the bad guys are on connected by ladders). Your dude doesn't walk on the ground, he hangs from the next level up. I used a joystick, don't know if you can use the keyboard. The bad guys were just below you, your hanging feet would hit them and you'd die or something else bad would happen, but if you hit the button on the joystick you could raise your feet up for just a bit, long enough to go over the top of them, or you could stop on top of them and squish them. There may have been some dudes you couldnt' squish that you had to skim over. You'd get to the top of the building and that was the end of the level, I'm not sure if you had to fight anyone or not at the top. But the next level was much of the same, just more bad dudes. I realize this is pretty sketchy information, but if you have played it before you will recognise it from that I think. If you don't recognise this then you probably didn't play it. Edit: Somebody suggested that it might be Lode Runner. That unfortunately isn't the game I'm looking for.