That looks awesome! Very similar to the game my friends and I used to play with gmaps a long while ago. We created a group, place private POIs shared with the group, then go hunt. The game was that the POI was close enough to the object that you’re not searching a wide area, but far enough that you still had to search. The POI name was a clue, the only clue you get. My friend told me about this game, adapted from her parents, who used print maps. Her dad proposed to her mom through the game. A bit much for this comment, I think, but my friend took the story of their engagement and made it into a gmaps game. It was fun! And this geocaching thing looks fun, too!