I did hold the key down. It was still slow. I watched your video and it's faster than it was on my machine whether I played in the browser or the Windows version. However the computer has since had a reboot forced by loadshedding so I went back to the Windows version and the speed is fine now. So it is not liking my computer when I have a lot of other resources open/running/in use; however, other games are still able to run fine when that is the case.