杜先生！

This section needs additional citations for verification . Please help improve this article by adding citations to reliable sources in this section. Unsourced material may be challenged and removed. Find sources: "Mr. Do!" – news · newspapers · books · scholar · JSTOR ( August 2021 ) ( Learn how and when to remove this message ) The object of Mr. Do! is to score as many points as possible by digging tunnels through the ground and collecting cherries. The title character, Mr. Do (a circus clown—except for the original Japanese version of the game, in which he is a snowman), is constantly chased by red dinosaur-like monsters called creeps, and the player loses a life if Mr. Do is caught by one. The game ends when the last life is lost. Cherries are distributed throughout the level in groups of eight, and collecting all the cherries in one group without a pause awards bonus points. A level is complete either when all cherries are removed, all creeps are destroyed, "EXTRA" is spelled, or a diamond is found. Mr. Do can defeat creeps by hitting them with his bouncing "power ball" or by dropping large apples on them. While the power ball is bouncing toward a creep, Mr. Do is defenseless. If the ball bounces into an area where there are no creeps to hit (such as behind a fallen apple), Mr. Do cannot use it again until he has retrieved it. When the power ball hits a creep, it then reforms in Mr. Do's hands after a delay that increases with each use. Mr. Do or the creeps can push an apple off the edge of a vertical tunnel and crush one or more creeps. If an apple falls more than its own height, it breaks and disappears. Mr. Do can also be crushed by a falling apple, causing a loss of life. Occasionally, the creeps transform briefly into more powerful multicolored monsters that can tunnel through the ground. If one of these digs through a cherry, it leaves fewer cherries for Mr. Do to collect. When it digs under an apple, it often crushes itself, other creeps, and/or Mr. Do. As the game progresses, a display at the top of the screen cycles through the letters in the word EXTRA. Every time the player's score reaches a multiple of 5,000 points, the highlighted letter enters the playfield as an Alphamonster, which can be defeated in the same manner as a creep. Defeating the Alphamonster awards its letter; collecting all five letters ends the level, plays a cut scene accompanied by the theme to Astro Boy , and awards the player an extra life. Alphamonsters attempt to eat any apples they encounter, which makes them difficult to crush. The creeps spawn at the center of the screen. After they have all appeared, the generator will turn into a food item; picking this up scores bonus points, freezes all the creeps, and calls out an Alphamonster (if one is not already on the field) and three large blue monsters. The latter can eat apples as well. The creeps stay frozen until the player either defeats all three blue monsters, defeats the Alphamonster (in which case any remaining blue monsters are turned into apples), loses a life, or completes the stage. Rarely, dropping an apple reveals a diamond which, if collected, completes the level and awards a bonus credit to the player.