I made a 3D map of the NYC subway that shows how deep everything actually is

I was on the subway one day and wondered what's actually under the street when I'm in the city, so I built this. every subway tunnel and station at its real depth, with the live trains moving around on it. It also does directions (which entrance, which car to stand in, which exit) and keeps working underground when GPS dies. You can mess around with it in your browser here: web.belowtown.com iPhone beta if anyone wants it: belowtown.com/beta?s=sideproject (check your spam for the TestFlight email for an invite to this once you click here). Im super open to any feedback if you want to provide any through here! Android's not out yet but you can get on the list here, it will notify you when available: belowtown.com/beta?s=sideproject&p=android Would love to know what you think or if anything's broken.