I played it by typing in random names of countries and when one of those was correct, I tried adding neighbor countries until those were accepted.
I'm sure I'm missing something--or there's a glitch to work out.
Sometimes I find that my Safari browser is at fault, but I tried this with Chrome as well and still no luck in seeing a merged blob of countries.
Oh and Gran Colombia is back.
Guyana and Venezuela, Argentina and Chile, Argentina and Bolivia, Argentina and Uruguay, Venezuela and Colombia