Thanks! Djen's quest does require you to visit multiple locations; I think three in total? The survey event should say either 'head further along the coast for more' or 'now we can head back to town' as you visit locations, and if you still can't return to town after getting that second message then that's a bug.
(Probably not? I do some non-text, 3D gamedev stuff, but that's a whole other kettle of fish in terms of production that would mean I'd basically have to redo the entire game.)