I tried playing Adventure mode but when I go to the Archipelago level, I explore the first island that I'm on completely but there's no wormhole to be found anywhere.  I've scoured the map view to see whether it was hidden under a spider nest or something but I can't find it at all!  I died and restarted Adventure mode and went back to the Archipelago level again but encountered the same thing--no wormhole to any of the other islands.  I figured the first time I encountered this issue, it might