It must be something on your laptop, since I've tried the game in and old laptop of mine, and it works fine. Any particular animation or everyone works bad?
Viewing post in Genex Love 1 (0.9.97) (Complete) (NSFW +18) comments
There's one in F95, not sure if it will work better for you.
https://f95zone.to/threads/genex-love-v0-2-11-reboot-love.109949/page-11