Oh its a nes game. I think a good canidiate would be Deadly Towers. In just the last 10y I heard from a friend the dungeons wrap around. Invisible dungeon entrances. 100+ room dungeons that has just one shop if you can find it. Then find the exit. You have to upgrade all your hearts which requires clearing the towers and their alternate. Find all upgrades/armors.
It will stay unfinished
All the iron turn to rust. All the proud men turn to dust. All things time will mend