Good start, had an issue after I completed my team though.

I would totally share this on my wall - no Share button!!!

Edit: Oh I see what you did there. It automatically put stuff on my friends' walls without confirmation from me.... no likey.

I would have preferred to do one post on MY wall that tagged all of my friends.

One thing that I thought might make your app more engaging: perhaps you could provide different categories for team members (I am way overthinking this, sorry I was in the Army)

- Medic - Engineer - Sniper - Melee Beast - Driver

Just some thoughts - it might lure in additional visibility when ppl would say "Hey, I am totally NOT the driver - make me the sniper!"