If you know Unity doesn't support multiple webGL builds on a single index.html page.

It's not the first LD event when we are puzzling over how to put POST-JAM build to be easily available without replacing JAM version from LD page :D

And finnally we managed to pack both versions into a single zip file!!!

So now you can try our POST-JAM version on Ludum page:

SUPA SEAL-MAN!! 小さな氷山島に魚の事故!!

P.S. Let us know if our solution works for your browser