There are some instructions at the bottom of the itch page since we have noticed that people are getting lost on the controls. To use items(if they have a use), you open your inventory then drag the item to the bottom right where there is a box which says use. This is also how you refuel your torch(by burning wood/paper in the top right icon), as well as reading the journals or getting descriptions(top left inspect). Hopefully that helps!
-Henry_Hamster