Better to have some sort of introduction ingame (controls usage). To bad the game wasn't polished enough. 
Next time keep the scope small ;-)

At first I was a bit confused about "swiping right" on an animal, then I remembered it was a friend app and not a dating app lol.  I think you have an interesting idea here.  I think it would be neat to set up hobbies that some of the characters have and if they match yours it could give you more points.  There could be some that completely conflict so that swiping right on those would give you negative points.  Looks like it could be a fun mobile game.