There’s something touchingly itchy about the title character in the drama “Jeremiah,” receiving its world premiere at Lakewood’s Benchmark Theatre. Actor Kaden Hinkle captures the physical unease of the 14-year-old, who thrusts his hands deep into his jeans pockets, who is more comfortable gabbing with pigeons than people and whose mother split and left him and 15-year-old brother Mitchell (James Giordano) to the rough care of their father.