Game: Blind Man's Dungeon

Imagine it's 1982.  You walk into an arcade and there are dozens of stand-up machines blinking away in the dim light.  You have a pocketful of quarters and an afternoon to kill.  Among these machines you see a game called Blind Man's Dungeon.  The demo blinks away in front of you: a pixelated adventurer traverses the screen in wide circles, collecting treasure and vanquishing foes while a little fairy builds walls.  "Interesting," you think, and pop in a quarter.