The goal of the video game Doodle Jump is to keep the creature known as "The Doodler," a four-legged critter, from falling off an endless series of levels. The left edge of the playing field curves around to meet the right edge.
Doodle Jump's gameplay is extremely addictive, and despite how cliche it sounds, it is simple to learn but difficult to master. Because it is a game that can be picked up and played at any moment, it is perfectly suited for the device, and the hand-drawn images appeal to the majority of players.
When the phrase "doodle" first appeared in the early 17th century, it was intended to allude to a fool or an unsophisticated person. It is probable that it derives from the German words dudeltopf or dudeldop, which can mean either simpleton or noodle (literally "nightcap").