Some googling shows that Ren'Py should work in Windows 7, but I did find this thread:Hi! I tried running the game on win7 64bit and won't launch... do I need to download any framework or something to make it work?
https://f95zone.to/threads/new-renpy-version-doesnt-run.76356/
"This release also raises the minimum requirements to run a Ren'Py game. It is now required that a user's computer have OpenGL 2, DirectX 9, OpenGL ES 2, or WebGL to run Ren'Py. The model-based renderer requires OpenGL ES 3 or WebGL 2."
"Problem was in the graphics driver itself (e.g my old i3-550 cpu, HP PC did not let me update graphics driver from intel site from 2010 version to 2013-last version for my cpu, I had to do that manually, but it CAN BE DONE), that needed to be updated to completely solve the problem mentioned with OGL version"
This game runs on a recent Ren'Py build, 8.0.1.