How do I use the unlocked customizations, how do I save the game and how do I enter the inn?
In the main menu a button with the customization appears in the bottom right corner. The game still doesn't have any save except the number of the chapter you've reached (in this demo just 1 or 2) and the items. I'll introduce a full save in the very next build. You can't enter the inn, at least for now.