Kudos for shipping something, that's awesome!
Feedback:
Network effects are working against you. If lots of events are on here, it might be a useful place to search for sports. If lots of people search for sports on here, it might be a useful place to recruit people to my events.
Without either, this provides no value to me.
Product:
* As a person who wants play a sport, this app is not useful to me. There were no "events" nearby me to join.
* As a person who organizes pickup sports with friends, I'm not sure why I'd use this over my favorite messaging app to organize.
* As a person who wants to recruit new people to join pickup sports game, this app isn't useful for me. I help "advertise/promote" my pickup games on email lists, FB pages, and a meetup page. Creating an event here doesn't seem worth my time since I'm not convinced that it'll bring in people to play with.
Technical * Facebook login didn't work for me, it said some error about a bad location or something.
* Loading is painfully slow.
* It crashed after I tried to create a "I want to play sports" event.