Warning to others with ultrawide monitors; you effectively cannot play this game with an ultrawide screen. No way to choose the resolution and much of the screen is cut off from top and bottom.
Viewing post in [NSFW] [Free] Time freeze?!! Stop-and-tease adventure comments
It's possible. (I have a 3440 x 1440 monitor)
First, create a shortcut for the game, then right-click said shortcut and select properties.
Second, click on the "Target" text box and add the following text:
-screen-fullscreen 0 -screen-height ???? -screen-width ????
(Make sure to change the question marks to the height & width of your choosing.)