I liked what they did with telekinese, introducing it so randomly as something that isn't important, and then making it a key aspect that didn't disappoint.
Also I REALLY liked how they hinted at multiple universes by showing multiple timelines and making the end a paradox. I mean there were even multiple hints at Cid being Joe.
"You had this sharp look from under your brown hair" --Cid has a sharp look god damn, and his hair is brown.
"When I first gave you that gun, it was bigger than you" --Joe tells Cid 'that gun is bigger than you, are you going to use it to polevault?'
"My mother used to go with her hands through my hair" --The final shot shows Lara going with her hands through Joe's hair, she'll probably repeat that with Cid.
This could show that in a seperate reality, Cid would grow up to be Joe?
Also
http://screenrant.com/looper-ending-exp ... poilers/2/