Pretty sure you should describe how combat works, because it is confusing to me first time.
Also I think the dungeon creation has a bug: if you click, not drag, one dungeon room then it will be disappeared. Or is it a feature? xD
I agree with you that the game lacks a decent tutorial.
The bug with the dungeon creation was not fixed during development. Fortunately, it's only a bug in the room amount display, you can still drag the rooms.
Thank you for your feedback.