For sure, my pleasure. I played it in a browser running under Linux. Possibly there could be similar issues on MacOS and Linux if MacOS is actually Linux-based or Linux-derived, but I'm not sure on that. Or if there is a known problem/issue on the Mac then possibly it could be a game engine issue and not your sourcecode at all. The hardware I am running is old by today's standards, so that could also be a possible issue if the demands of the game outpace the capacity or speed of the hardware running the browser. So many possible variables, it is hard to track it down and isolate it.