He has visited ships and space stations too, like Devan’s Megairbase and the Twin Mega Battleships.
Each planet is located in a different area of the galaxy, and each have a different look. Many of the planets have been invaded by the Turtle Terrorist; and your mission is “cleanse” them of baddies. Others, like Deckstar or Dreempipes are giants refineries or hideouts from Devan Shell. But others, like Raneforus, are planets with wild life; where Jazz is missing and must find the way to escape safe.
Eat your lima beans, Johnny.