Interesting music! Also, interesting premise with the rise of human civilisation from an underground network of tunnels! There is definitely more to be expected from this! Perhaps the network could be littered with more artifacts from this past human civilisation that form a story about it? I feel they are much too important to be left so bare, aside from the intermittently hidden potions and stuff.
I found and defeated the Death Knight in the Flora ruins, but could get nothing from the guild. Surely you are planning to put a suitable reward there? I also one-shotted the Felhound for some reason.
Quite many tiles in Flora appear extremely questionable. Is there a purpose for that? Toward the North I thought that there was maybe a bridge to cross the miasma, but the object in question turned out not to be.
Characters get about even utility among themselves, which is good. A comment below did already mention the haphazard introductions between characters, which is still particularly noticeable when it comes to the very first two characters, Allan and Ashley.
Was Marcus pictured in the screenshot available in this demo? If so, then I missed him entirely.