How do you get experience points? I still have zero despite having fought wisps, wolves, slimes and completed quests. Only a few hours in. Is this a bug or do you only level up by advancing chapters?
Viewing post in Caliross, The Shapeshifter's Legacy comments
You don't really level up in this game, but you do get extra stats when you sleep after you complete a chapter. There are also other ways to increase your stats, and learn new spells. Equipment is also very important.
For the screensize, you can cycle various options by using the F5 and F6 keys (whether you want fullscreen, if you want to keep the aspect ratio, and so on).