The Dancer's Reward by Audrey Beardsley was part of a series of illusions for Oscar Wilde's play Salome (1896), an adaptation of the biblical story. As reward for her beautiful dance, Salome asked her father King Herod for the head of John the Baptist.
The names of these paintings may ring a bell in those of you who have completed the game. The game actually makes a big deal about a Salome painting that it refers to by name, but it's not this one in Tin Tong Theatre!