changes possession or you score. If you score you get an and 1. If not you get the ball back.

2) an alley oop is scored from the place where the last person touches the ground and the ball simultaneously. I.e. if you throw an oop from behind the 3 and the other player catches and dunks it you get 3 points.

Bonus content idea: Shots (or alley oops initiated) from behind half court are worth 4 points.