"Invert Y" option makes game unplayable on Windows

I've just come to learn thanks to a tester that the game becomes unplayable on Windows when clicking the "Invert Y" options for the mouse in the options screen.  This is because it makes it impossible to look upwards with the mouse.  If you are on Windows, I recommend either:

Sorry for any inconvenience this has caused.  If you encounter any other playability issues with the game, please let us know.