Hmm....I have no idea what the dev changed, but the game runs like crap after the latest update. Was super smooth until now. When wasn't an 8-gen i7 with Intel Iris Plus Graphics 655, 16GB RAM and M.2 ssd enough? Anyone else experience framedrops, stuttering and slow gameplay?
I noticed something similar happening with Milf Pursuit. I think it might have something to do with Renpy.
If you can find the dev, tell him to only redraw on scene changes instead of on mouse movement. Right now, how he's done the game, is that when you move the mouse, it redraws the entire frame. That means you're drawing as fast as your CPU can allow GPU calls, while moving the mouse. This is due to wanting to handling mouse hovering effects, but this is just a bad implementation.
This is my GPU whenever I am moving the mouse in the game.
Goes from nearly 0 to 80% GPU usage, so if you have a good CPU but bad GPU, you're gonna bottleneck and the game is gonna start lagging. That 80% GPU is about 1200FPS.
The solution is actually fairly simple: He's already redrawing at what seems to be 60 fps. That means 60 times a second there's a redraw being called, there should be no need to redraw on mouse movement on top of that.