Middle game tactics??
I think u are white , and as white u are in clear situation , u are going to attack on king side. For the attack u will need f peon push or mb h peon push.
This will not be easy cos u wasted alot of moves bishop was better on b2 then blocking ur way on g5 also u will soon be attacked by the full developed black on queen side as ur bishop on c4 is in big problems ( a6 --> b5 ). The only way to save the bishop would be a4 now
hope u are black :)