Justin Huertas’s Lizard Boy, a queer pop-rock indie musical with a sci-fi vibe, is funny, poignant, and life-affirming. Huertas, as the titular character, is a sweet and likable protagonist in this coming-of-age love story even though he suffers from having green, scaly skin. Cleverly directed by Brandon Ivie, and under the aegis of Prospect Theater Company, this show is a terrific homage to—and satire of—comic-book mythology.