"Cosmo's Cosmic Adventure is a video game programmed by Todd Replogle and published by Apogee Software in 1992. It is a two-dimensional side-scrolling platform game produced for the PC platform, and features 16-color EGA graphics at 320×200 screen resolution. Working titles for the game include "The Adventures of Zonk" and "Cosmo: Kid From Space".
The storyline is about a little alien boy named "Cosmo". Cosmo's parents are taking him to Disney World for his birthday. A comet hits their ship, forcing them to land on an unknown planet and repair the ship. Cosmo goes exploring, and when he returns, his parents are missing. Seeing large footprints, Cosmo thinks that his parents have been captured and sets off to rescue them before they are eaten. There are 3 episodes in the game series in which Cosmo must navigate through 10 alien-themed levels.
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Source: Wikipedia, Cosmo%27s Cosmic Adventure , available under the CC-BY-SA License.