Scottish playwrights Kieran Hurley and Gary McNair explore the murky pre-adult domain with candor and humor in "Square Go," an appealing two-hander directed by Finn Den Hertog and featuring two fully adult actors, Daniel Portman and Gavin Jon Wright, portraying"respectively"Max and Stevie, a pair of  13-year-old besties who seem to transform, regularly, into each other's biggest enemy. There are hilarious moments …
