I've heard the mouse thing has happened to a few people, and I've been trying to figure out why. My best guess is the menu state is somehow not setting right in that specific scene.
The stylistic choice of having harsh shadows was one I went with to try and make the game pop a bit, but I can definitely see why with the wrong light angling that might look a bit strange - if I continue this project stuff like that is high on my list of tweaks to make. I spent a lot of time refining the visual style to try and be a bit more unique with this one.
I'm glad you liked it - thank you for playing!