Players take control of B.O.B., Missing Link, Dr. Cockroach PHD, and Ginormica/Susan Murphy in all platforms plus Insectosaurus on the Nintendo DS version of the game. Each level is divided into multiple stages in which the player takes control of each monster's unique abilities to fight off enemies. The Missing Link can stick to the sides of large robotic bosses, take control of missal turrets, and agilely outwit his opponents with superior acrobatic skills, B.O.B. will have to solve complex one step at a time 3-D mazes, can turn floating plasma generators into personal Turrets, slide through grates and use enemies as living Key cards/ammunition, Dr. Cockroach serves as a secondary co-op player to B.O.B. or The Missing Link with new abilities such as the tractor beam being purchased in the DNA lab, and finally Ginormica will use cars, Jeeps and hover platforms as roller skates to dash, Kick, Jump, and Duck through enemies and fight all bosses to devastate enemies. The music was composed by Jim Dooley, with live brass recorded at the Warner Brothers Eastwood Scoring Stage.
Source: Wikipedia, "Monsters vs. Aliens (video game)", available under the CC-BY-SA License.