Super Mario Land 2: 6 Golden Coins
While its predecessor was similar to the original Super Mario Bros., Super Mario Land 2 has more in common with Super Mario Bros. 3 and Super Mario World: The player is no longer restricted to moving right in a level, and any level (except for the introductory stage) can be replayed. At the end of a level, there is a door that must be touched to clear a level. In addition, there is also a bell above the door which, if touched, activates a mini-game where the player can try to get either a power-up or extra lives.
There are 32 levels in total, based in several different themed zones. Some of the levels can only be accessed by entering in secret exits found in regular levels.