Sure, the graphics aren’t quite on par, but compared to the original’s 3000+ lines of JavaScript, managed to implement it in a few hundred lines of assembly, and was of course constrained by the 512 bytes of the boot sector itself (well, 510 plus the signature). But neither a browser nor actually an operating system are really necessary for that, as shows with a boot sector implementation of the same game.
Plus, you can easily pass the time of being catapulted back to the prehistoric ages by navigating a jumpy little creature from that same age through a field of cacti - at least if you’re using Chrome or Chromium. finding peace in accepting a fate out of your control. It’s said that slow internet is worse than no internet at all, which is mainly a matter of continuously crushing all hope and sanity vs.