On the original subject of DDR, I don't think the minifigure has any animations for things like pressing Up and Down at once. How would it react if you pushed Up, Down, Left and Right at once? Split each leg foot in two and hit all four parts?
Bomberman sounds quite fun. Have the remote bomb model, fire four massive particle-emitting shells out of the sides when it explodes? You also need it to go to the center of the 4x4/6x6/8x8 block it's in so you can have it perfectly firing up/down/left/right corridors.
Perhaps use the setControlObject functions to have it a better third person? Drop camera at all players, setTransform it above/looking down, create a bot, set controlling bot rather than camera.
Maybe you could do what some people from, I think, [Force] on RTB did and make a remote played Super Mario Bros. game.
Blockhead versions of every popular NES game, ha ha.