Customize website guessing game

I have a location guessing game here on my website: [login to view URL] Essentially you are placed someone on the globe using Google Street View, and you must guess where you are. I purchased the code for this here: [login to view URL] Currently the game takes in pre-defined coordinates. Instead, I'd like the game to take in random street view coordinates. Furthermore, the game uses a scoring system where you score more points the closer you get to the correct location. Instead, I'd like the scoring system to work as follows: You get a score based on how many miles away from the correct location you are. The objective therefore is to get the lowest score.