I was curious about how they did the first-person view on the hi-res screen. The answer was somewhat unexpected: they drew it with character glyphs and a few horizontal lines.
The game was written for the TRS-80 and ported to the Apple II, apparently by someone who was not an expert in either 6502 or Apple II programming. It gets... interesting... in spots.
A full disassembly, as well as a complete walkthrough of the game, can be found here:
https://6502disassembly.com/a2-deathmaze/
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