How is your game related to the Theme and Special Object?
My game is related to the theme, four colors, through the attacks used by the characters in the game. Each color represents a type of attack. One color for each opponent, and player wields all four colors.

Magenta is associated with large, area effecting, slashing attacks. Orange relates with explosives, blue with long range beams, and purple with quick slicing attacks, thin, long-range single target attacks.

The special object, the sponge, is included as a gag weapon. It was used as if it was one of the unique weapons. The sponge can be thrown mid combat at the enemies, which gave me a few good laughs :) It does no damage, but I'd like to imagine it does emotional damage.