You are a bounty hunter and the bounty is in the room. Walk up the ramp to see what happens. Since you hear someone coming, you quickly hide behind that rock.
Pfew, that was close. Now how to lure that man out of there without the one-on-one fight…
Have a look in your inventory. Wow. We’re carrying quite some stuff. Especially that mine is interesting.
Put the mine half way up the ramp, where the surface is still flat. Then go back behind the rock and shout at the door. Tell him it’s a metal pancake with a cherry or something. As long as he’s walking down the ramp….
Game source: A copy of the game was found here on the internet.