Thanks, Mandy. The game intentionally starts off slow, but if you hold a key (any key, really, but I usually use the one in the direction I’m going), it will accelerate the Wyrm. And, of course, it gets faster the longer you get. Let me know if knowing that changes the way you think about it.
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.