Hi! Thanks for reaching out.
Normally you just install this like normal renpy-based game w/o any additional software (provided your PC/Mac/Android is up to date enough)
But, in order to understand ur problem more, Can you give me the specs of your system like:
-What platform do u use? (Pc/mac/android)
-specs of ur system? (What kind of OS, etc)
I'll try my best to reach out ASAP to help but meanwhile you can Google this issue with keyword lole "Installing Repny games on (pc/mac/android)" or smth like that
Cheers,
MxRandom1401