DROD’s a good game.
I am not a huge fan of King Dugan’s, aside from a few very specific floors (notably 22/23), so fast forwarding over the dull/repetitive puzzles. JtRH is paced much better.
you can play DROD in a browser if you want to! Also there’s the half-assed clone I made that I didn’t finish because things. Game might make a bit more sense once you’ve messed with one of them a bit.