I'm guessing that the theme doesn't have to be exactly candy but rather about candy?
e.g. a game that revolves around (is about) eating candy, instead of the game just being candy everything (i.e. the background, characters, floor e.c.t. doesn't have to be of candy design, but at least one important aspect of the game has to be something around candy like the player having to eat candy in order to stay alive?)