I really like how you are stepping out the ideas for your game with the community.
Your quest, The Jersey Devil, caught my attention here ... I'm from New Jersey (live in Ohio now) and thought I would just add that the area in New Jersey which the Jersey Devil folklore hales from in know as the Pine Barrens---which has lots of pine trees---so you might want to consider some Pine trees during this level of the game play just for good measure. The New Jersey Parkway is a major thoroughfare that runs North and South in New Jersey and runs through the Pine Barrens.
Here's an idea.
There is another horror folklore story that takes place in Staten Island, New York----a man the people called 'Cropsy' ----there is a documentary film about it running on Netflix right now. If my memory serves me, Something about a man who was killing children near an old inactive mental hospital that use to house people/children who were removed from their homes because of tuberculosis back in the day. Could make for another interesting quest. Look it up.
In the meantime, have fun making your game.