The problem seems to be with everything except the menu selection and the back arrow. Here's a quick show of the bugged game play. I went back and clicked on everything. You see that it seems the game is registering my clicks too far up and to the left, meaning if I want to select something, I need to click down and to the right of what I want to select. This makes selecting items in the inventory impossible. My screen resolution is 1920 X 1080 (the recommended resolution for my computer). It's a pretty new computer, and it doesn't have issues with other games (I pulled up a few other games to test it out).
I love this game concept. I hope this helps!