Yes so sorry, it's currently USA only. The plan is to add more countries over time. I edited the original post to make it clear the beta is currently USA only.
OP you should have pointed that out in your post also what's your reply about incentivizing people on going out for this kind of game/app? As I said earlier I don't think that this is the right time for you to release such app when people should be going out less and less because of the current pandemic we have. With your app you are actually encouraging people to go out more even if it's dangerous. Maybe have your app be more rewarding in having prizes indoors instead of being outdoors.