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The main protagonist in this game, the Crazy Climber's main objective is to scale the side of each of four skyscrapers in the game. He must avoid all dangers to successfully complete his mission; if he succumbs to any danger, he will be knocked off the side of the building and lose one life. The game ends when the player exhausts his supply of lives (usually three, depending on the setting); an extra life is awarded at 30,000, depending on the game setting.
If the player succumbs to a danger, he will yell, "Oh no!" as a tune plays. If the player has lives remaining, the game will resume at the point where he was knocked off, with the most recent major danger eliminated.
The most common danger to the player, these windows will shut, either to impede Crazy Climber's progress or — if they shut on his hands — cause him to fall from the building and lose a life.
These bald-headed residents of the building, apparently annoyed at Crazy Climber's efforts to climb the building, hurl various objects at the game's hero, in an effort to knock him from the building. These objects include flower pots, buckets of water and fruit. Flower pots are all that appear early on, but the larger objects are used by more aggressive (and numerous) Mad Doctors later on. If enough objects hit Crazy Climber's head (or if he is positioned just right), he will be knocked off the building.
A giant California Condor flies across the width of the building, dropping eggs and excrement aimed at the climber. In the early stages, only two of the droppings come at a time, but this increases to eight by the latter stages of the game.
As before, if the Climber is hit by too many droppings in succession, he dies.
The giant ape from the movies, whose sole objective is to punch the much smaller Crazy Climber off the building.
First seen in the game's second stage, these falling steel girders and iron dumbells serve to try to knock Crazy Climber from the building upon contact.
Protruding from electric signs that appear in the upper levels of the later skyscrapers, Crazy Climber can withstand 10 shocks without danger. The 11th shock, however, is fatal.
First appearing in the third level, Crazy Climber must avoid these signs at all costs, as they will knock him off the building upon contact.
Appearing for the third and fourth buildings, this red balloon can net the player bonus points if he is able to get Crazy Climber to grab it. In addition, Crazy Climber is transported up 10 stories to a safe window. However, the player has only a limited amount of time to grab the balloon, before it drifts away.
Awaiting Crazy Climber at the top of the skyscraper is a helicopter, which makes several passes at various points along the roof. If the player is able to get Crazy Climber to touch the runner, he nets a bonus (determined by the building stage and how much time was used to scale the building), a victory tune plays and the game progresses to the next round, where a more challenging skyscraper awaits.
If the player does not grab the runner, the game still moves on to the next building; however, no bonus is awarded.