Super Mario Bros. 2 is a 2D side-scrolling platform game. The objective is to navigate the player's character through the dream world Subcon and defeat the main antagonist Wart.[1] Before each stage, the player chooses one of four protagonists: Mario, Luigi, Toad, and Princess Toadstool. All four characters can run, jump, and climb ladders or vines, but each character possesses a unique advantage that causes them to be controlled differently. For example, Mario has balanced speed, jumping height, and strength; Luigi can jump the highest, but moves slightly slower and has weaker strength; Princess Toadstool can float because of her dress but has the lowest speed and strength; Toad has the highest speed and strength, which allows him to pick up items quickly, but jumps the lowest. Unlike Super Mario Bros., this game has no multiplayer functionality and no time limit. The original only scrolls from left to right, but this game can also scroll right to left, and even vertically in some areas. Unlike other Mario games, the characters cannot defeat enemies by jumping on them but can stand on, pick up, and throw most enemies at each other to defeat them. Other objects that can be thrown at enemies include vegetables pulled from the ground and mushroom blocks.[2]
The game consists of 20 different levels across the seven worlds comprising Subcon. Each world has three levels, except World 7, which has two.[3] Each world has a particular theme that dictates the obstacles and enemies encountered in its levels, such as desert areas with dangerous quicksand and snowy areas with slippery surfaces. Levels contain multiple sections or rooms that are connected via doors or ladders. Some rooms are accessible by entering certain jars. Magic potions found in each level are used to temporarily access "Sub-space", a reflected, unscrollable area where the player can collect coins and Mushrooms that increase the character's maximum health. In addition, certain jars, when entered in Sub-space, will warp the player to the later worlds, skipping levels altogether. Other items available include cherries, which are collected in order to acquire a Star; the POW Block, which can be used to destroy all the enemies visible on the screen quickly; and a stopwatch that can stop enemies from moving for a short period of time.[4] The player must defeat a boss enemy at the end of each of the first six worlds, then defeat Wart himself at the end of World 7 to complete the game.
The player starts Super Mario Bros. 2 with three lives, one of which is lost each time the player's character loses all health from enemy or hazard damage or when the character falls off the screen, represented by hearts. The player can replenish health by collecting floating hearts that appear upon defeating a certain number of enemies. The player will receive a Game Over upon losing the last life, though the player may continue up to twice in one game. Extra lives may be obtained by collecting hidden 1-Up Mushrooms or by using the coins collected from Sub-space to play the Bonus Chance minigame between the levels.[5]
