Exploring Symbolism in a Batman Game

My brother plays a lot of Xbox and recently got the Batman: Arckham Asylum game that he beat in 3 days. The game is based on the idea of Batman fighting evil thugs and characters to get to the boss, the Joker. While watching him play this game I noticed that the different colors of the characters and landscape have a lot of symbolism.

Colors and Symbolism
The setting of game is set on a prison island that is conveyed in a dark, foggy landscape, this represents the darkness and mystery of the island. It shows the landscape is an unknown area that contains chaos, death, or evil.

Batman is the hero within the game and interestingly he is always dressed in black or dark colors. In this case, Batman's darkness symbolizes mystery as many people don't really know or understand who he is. Unlike other heroes, Batman seems to not care about being in the spot light with bright, exuberant colors, he wants to remain a mystery to both the public and his foes.

The Joker is a crazy, psychotic, freaky, funny character who wants to get rid of or kill Batman. Because the Joker is such a dramatic character, the colors on him really reflect who he is. The Joker is clown in a suit, he has white and red clown-like makeup and green hair. White represents peace or innocence while the red symbolizes emotion such as anger or excitement, this reflects the personality of a clown like the Joker. Clowns are often seen as funny characters with a range of emotions, the Joker is constantly in a crazy enthusiastic mood with emotions that can change dramatically. Most of the time for the worst when it comes to getting rid of Batman. The Joker is quite a unique evil figure who distorts the image of what clowns are.

Other characters like the police officers and guards are dressed in blue which simply represents innocence and devotion. They are devoted to standing guard and keeping order within the prison while at the same time they are innocent characters tortured by the Joker and his evil plans.

Object symbolism in this Batman game include shadows and masks. Throughout the whole game there are quite a lot of shadows cast by people and objects such as trees or bushes. This really portrays the dark, evil side of the game as mostly every person or tree casts a shadow which adds to the darkness of the setting. The Joker's men all wear masks of clown make up trying to "conceal" or hide something. Maybe they're trying to hide who they are which contributes to the mystery of the prison and its people inside.

Could there be hidden symbolism within games or movies that contribute to a bigger meaning of the story like themes or morals?