can walk left or right, crouch, and jump. To attack, Kirby inhales enemies or objects and spits them out as star-shaped bullets. He can also fly by inflating himself; while flying, Kirby cannot attack or use his other abilities, but he can exhale at any time, releasing a puff of air that cancels his flight and can be used to damage enemies or destroy blocks. New moves include the abilities to run at a fast pace and to perform a sliding kick. A major aspect of the game is Kirby's copy abilities. By inhaling and swallowing certain enemies, Kirby will obtain powers based on the special ability the enemy possessed. Copy abilities allow Kirby to access new areas and experience levels in different ways. Certain copy abilities can only be used a limited number of times. Kirby can discard his ability at any time or lose it when he is hit by an enemy; he must reacquire it quickly or it will disappear. The game consists of forty-one levels across seven worlds, each containing a lobby with doors leading to four to five regular levels, a boss fight, and a Warp Star door which enables Kirby to travel back to previous worlds. Most worlds also contain minigames which allow Kirby to gain extra lives, museums where Kirby may easily gain certain powers, and arenas where Kirby must battle with a miniboss to win health and allow him to copy the boss's special ability. The game automatically saves the player's progress after each level. The objective of each main level is simply to reach its end. If Kirby touches an enemy or a dangerous object, he will lose a section of his health meter. If all of his health is lost or he falls off the bottom of the screen, the player loses a life. Losing all lives results in a game over. Kirby can touch or eat food items to replenish health or gain temporary invulnerability. Development Kirby's Adventure was developed by HAL Laboratory in Kōfu as a Nintendo Entertainment System (NES) successor to their 1992 Game Boy game Kirby's Dream Land. Masahiro Sakurai returned as director and designer, with Takashi Saitou assisting designing. Hiroaki Suga was lead programmer, while Satoru Iwata, Shigeru Miyamoto, and Takao Shimizu were the producers; Iwata also provided programming assistance. According to Sakurai, development began in 1992, after he was asked to port Kirby's Dream