For me the game runs at 60 FPS, but since it runs with VSync on by default, there is a noticable lagginess to the mouse movements. Please at the very least add a VSync option so people can have a responsive UI without needing to mess with their driver settings; or more optimally, add an option to render the mouse on the hardware, instead of your software, so the mouse movements are entirely divorced from the game's refresh rate.