(The game in 16:10 format; normally it runs in 4:3 format with black borders.)
Did you know that the game's aspect ratio can be changed via Steam launch parameters? This is done by adding the argument -set "render aspect_ratio=16:10" (or other formats like 16:9 analogously) to the Steam launch options.
For example, players on a 16:10 laptop who don't want black bars on the sides and don't mind a slight graphical stretch can easily adjust this as follows:
Added aspect ratio customization instructions to "1 - Readme.pdf"
(see install directory)