It seems that you're using an outdated browser. Some things may not work as they should (or don't work at all).
We suggest you upgrade newer and better browser like: Chrome, Firefox, Internet Explorer or Opera

I am getting around 20 FPS ingame with a pretty decent computer.
NVidia Geforce GTX 960M, Intel i7 processor, 8GB Ram, Windows 10.

What should I do?
With a 960M, it sounds like you're on a laptop, are you sure you're using the 960M and not the Intel chip? Check the program settings in the NVidia control panel.