I'm so sorry to only read this now —
What system were you playing it on?
I'm still pretty inexperienced with GPU programming (which generates the visual geography) myself, and MacOS devices in particular seems to really struggle
No problem with the late answer, really.
I'm using Windows10, on an Intel Core i5-2400 CPU @ 3.10 Ghz, 8Gb RAM, GPU is an Nvidia GTX770. Not top-notch material, I know :).
I read the other comments in the meantime and saw the Babble servers were located in Australia. I'm in France, so maybe that's the reason?
Anyway, cheers! Still a beautiful project you have here.
At this point I'm inclined to believe this may be due to the specific unity version this was built under, since it's only effecting specific devices. I'm not really certain what the solution may currently be sorry, and am unfortunately not really in a position to explore this further at the moment either