I wouldn't be sure "too easy" is something i would say about Zorbus, at least that latest version i'm playing.
I don't remember playing any other roguelike in which clearing the very 1st floor is already challenge
I mean... appropos to the topic thread, one roguelike I've played that could and did cheerfully murder you on the first floor (especially if you didn't go with one of the stronger starting classes/builds, ala summon heavy caster), was Incursion, an older D&D inspired RL
It got a lot easier as you figured out some things (nighthunters are busted strong mounts, tossing summons into rooms you haven't entered yet saves lots of lives, wands can be ridiculous, etc.), but even for me, someone who had won the existent game with every race, class, and god, still had to pay pretty close attention to floor one with certain race/class combos, heh.
They say ToME 4 has that level of difficulty on insane/madness, too, for what it's worth. Just not the
sort of challenge I'm even remotely interested in, personally, heh.
e: Though yeah, fired up zorbus again to look at it, first run
rapidly died a dog's death as apparently more or less the entire first floor promptly aggro'd to me, heh. Second run, however, immediately -- as in literally the first mobile thing I encountered -- met and recruited a giff. Me and spelljammer buddy promptly steamrolled the entire first floor, drove my enemies before me, and heard no lamentations because everything hostile was dead.
Also I got three skelefriends part way through, which was nice? Remarkably wild swing in results, in any case, heh.
e: Though floor two, well, floor two I got real lazy and died.
Now, run three. Run three has started with the classic
double phant gambit, plus an elf archer, so I got 80 hp of meat shield flesh crushers and a ranged death machine that apparently has
all the search, so. Progression so far had been *squish* -> spelljammer interrupt -> dumbo demolition derby. It's been pretty silly