Creating your own mission

If you could create your very own mission on any level, what would it be? I always thought it would be cool to have Courage the Cowardly Dog look for his owner Muriel in the Catacolms, and she sends him on a couple missions. Maybe a fusion stole one of her dinner meals or her purse and Courage has to find it.

Flapjack asks us to find bubby in the vicinity.

Dexter and Coop find a way to get megas working, and you have a giant battle with a giant fuse.