Wine. An undeniably useful asset whenever you come into contact with linux. Also there's a program that let's you run windows programs on linux, can't remember what it's called.
i know it’s been like 3 years(+1 month and 10-something days), but even the windows build of this has a shell script that can run the game on linux, because renpy games are cross-platform by default, and renpy is also very very cool and awesome :3