Pretty solid demo all around, can see lots of thought has gone into all the systems. Some feedback from my time trying it.
* There was significant game stutter on battle effects as the game loaded them in. I got the stutter on both the web and the downloadable version, though the web version seemed to get it worse.
* When you move in and out of rooms, the game screen darkens as you from to/from the transition point, but this can make it a little confusing. Coming into a room, it's easy to think the game's still loading the room and/or is frozen because the screen stays dark. And going out of rooms it's sometimes not entirely obvious whether you've moved far enough and the next room's loading, or you still need to move a little more forward.
* Minor thing but the marker underneath the active player character in combat was a little too understated for me, would be nice if it were a little clearer.
* At mission end had a screen with quirks gained and it said "Locked:" next to a quirk. Tooltip didn't explain what that meant.
* Being able to right-click out of menus would be nice instead of having to close the window manually.
* Sometimes the tooltips have the name of what's being affected, sometimes it's just an icon. Though I suppose a player would eventually come to know what all of the icons mean, it would be nice if they were all labeled in the tooltip to make it easier for newer players.
* When I went to embark to the "Novice Forest Exploration", I changed my mind and clicked to close the embark screen. That made the whole game have a tinge of red for some reason.
* Got a cursed item and my character's arms stopped displaying.