I'm enjoying this game as well (like a few others). :-)
What i am sad about, however, is that i can either do a descend run, or stay on 1 floor to explore. On a descend, it's possible to run through a floor to the stairs down without encountering any enemy, so you won't collect anything on that floor. But on an explore you only kill all the enemies, because all chests, trees and ores are already collected (and especcially some of the ores are what you need).
Would be nice if you had a third option (fourth actually, as there's auto too, where you stay on a selected floor until you stop): descend after killing all enemies (until you choose to return to town or are stopped yourself). OR, that the chests, ores and trees return after some time (might even be after 2 to 4 runs on a certain floor, so it would take time to collect them, but on an auto run you'll collect them anyway).