Hi – as of the latest update, the framerate should be locked at at max of 30fps, and there have been numerous optimizations to the animations. That being said, the game runs natively at 1080p and uses layered animations to create the parallax effect when you move your mouse, so it's still going to be more hardware intensive than your average VN.
To make things more accessible to players, we also added an animation toggle in the preferences section of the game that can let you swap those animations out for still images, which reduces the resource load to be completely negligible.