Dracula's Castle

I think the single feature of note in this game is its use of some fairly interesting graphics images presented in the ultra low res grayscale block graphics of the ZX-81. However, we're not just talking simplistic cartoon images or figures. The images are quite elaborate (and perhaps even a bit terrifying for, say, a 6 or 7 year-old). I wouldn't go so far as to call them "art" but in terms of the limits of the ZX-81's graphics capabilities, they're really quite impressive achievements. Besides these occasional images the game is a fairly standard primitive parser dungeon crawl. You are playing against the clock (the rising of you-know-who), which adds an element of tension. Death can come quite suddenly and the combat is fairly arbitrary. The interesting block graphics are probably the reason it was ported to other beginner low-ram machines like the VZ200 and the MC-10 (which also had the ability to input such block graphics directly via the keyboard). If you wish to experience some of what the earliest forms of "graphic" adventuring were like, this one would be a worthwhile example to explore.