what's your PC specs and did you used the browser version or downloadable for windows? The problem might be in your PC specs(?)
Viewing post in Night Shift at Fazclaire's Nightclub comments
Oh, its not the optimization - just your PC is quite weak probably. I recommend you try to lower resolution and quality preset via settings and tell me your FPS before and after please. If it wont change then It IS probably my bad, but if it will change - then just your PC is potato and I cant help you with that :(