The visitors led twice through Stephen Opoka's goal early in the second half before Jamie Guy put them back ahead after Spillane's equaliser. Guy also had the distinction of earning a booking for excessive celebration after his goal.
Kelly, a substitute, added to Spillane's penalty to level things up with a 25-yard drive five minutes from time. Another player to come off the bench was Rossi Jarvis, who managed half an hour on his return from injury.