Have tried the demo for a bit...
From what i saw, the maps are beautifully made if a little too big for my personal taste.
The party regulary talks to eachother, wich gives all of the characters a good feel to them, as they all seem equally important rather than having one MC alone.
The dungeon uses random encounters, wich is fine but not my cup of tea. The combat menu seems to be messed up a bit. It's all very small and the ATB bars vanish behind other UI elements.
The game uses a quest log system and a sort of "adventurers guild" type of thing. It feels like an RPG (wich it obviously is) but i felt a little overwhelmed by being thrown into it so fast.
Balance seems to be off. Or i happened to progress too fast? I can't tell. Ended up in a frozen room with floating platforms (As seen in one of the screenshots) and got stomped by 4 Ice scorpions on level 2.
There are a few typos and other grammar errors, but that's something to easily ignore in a demo.
Overall it's interesting and fun to play, if a little cliche. Hope the story will have some good twists in the future.
Personally i enjoyed the beautifully made maps the most. Second place has to be the interactions between the characters. Would have been nice to know them a little more before they got sucked in.
Least enjoyable thing was the random encounters.
Hope the feedback helps! You got a good thing going on here.