Sorry to hear it. Have you tried uninstalling/reinstalling it?
If that doesn't work let me know what platform you're using and if it's giving any error messages. -Oz
Viewing post in (18+) Flora and Sauna: Full Game comments
Ok. My current guess is that there's an issue with which renderer is being automatically chosen for your PC.
https://www.reddit.com/r/RenPy/comments/ltmmww/importerror_no_module_named_renpy...
If you mess around with selecting different options outlined in the link, you may find one that launches properly. If that doesn't work you can DM me the log.txt file in the game folder and I'll investigate more. -Oz