Yeah... it was definitely a struggle to get the WASM build running reasonably well on Windows Chrome, and we haven't optimized it for macOS browsers. On the bright side, all that optimization for the web build made the desktop versions super efficient.
I’ve already improved the contrast on those dark mobs along with a bunch of other tweaks, but right now I can only build for Web and Windows, and I'm trying to avoid pushing more fixes during the voting period.
Once my colleague gets back from vacation, we’ll likely drop an update with all these changes... we're actually thinking about trying to make a complete game out of it.