Cuphead's gameplay is centered on continual boss fights, interspersed with run-and-gun levels. Each is housed in one of four worlds, with the final fight against the Devil. Each boss fight includes a simple, regular, and expert difficulty mode (with the exception of the final two bosses, which lack a simple mode). Defeating a boss on regular mode is required to progress through the game and unlocks expert mode for that particular level. Most boss battles take place on land, although some involve player characters piloting aeroplanes and play like a side-scrolling shoot 'em up. The game includes role-playing elements and a branching level sequence.[2][3] Player characters have infinite lives, maintaining all equipment between deaths.[2] Equippable weapons and special abilities, referred to as Charms, can be purchased from Porkrind's Emporium, an in-game shop, using coins found in levels and the overworld. Player characters can use a slapping parry attack on objects marked in pink to various effects, the most important of them being a super meter charge that enables more powerful attacks. The super meter is represented by a row of five playing cards, and can also be charged through attacking or Charm effects. An enhanced attack can be executed at the cost of one card, with its particular form determined by the currently equipped weapon. The most powerful strikes, or Super Arts, require the Super Meter to be fully charged and will completely drain it upon use. Three Super Arts are available, one in each of the first three worlds; to earn each one, the player must enter a mausoleum and parry a horde of ghosts to stop them from reaching an urn at the center of the screen. After completing a level, the players are ranked with a grade based on performance, determined by the time taken to complete the level, hit points left post-battle, number of parried attacks, and the number of times part of the super meter was used, in addition to the level difficulty. The levels are accessible through a top-down perspective overworld with its own secret areas.[3] The game has a two-player local cooperative mode,[4] in which either player character can return to the game after being killed if the one parries the other's soul before it rises off the screen. Cuphead's brother, Mugman, acts as an alternative skin and potential co-op partner within the game.[5] The DLC expansion, Delicious Last Course, adds a new area with its own campaign, including new bosses, weapons, and Charms; a third playable character is also added, Ms. Chalice, who replaces either Cuphead or Mugman when equipped with the Astral Cookie Charm. Ms. Chalice has her own unique set of moves, including a double jump, an invincible roll maneuver, and a parry dash.[6]