“Cosmic Spacehead” (also known as “Linus Spacehead’s Cosmic Crusade” on the NES) is a point and click adventure game by Peter Williamson/SuperSonic Software.

First released in 1991 for the NES, then re-released in 1993 as “Cosmic Spacehead” for the Amiga, Sega Game Gear, Sega Master System, Sega Mega Drive and PC DOS/IBM.

In August 2021, the Mega Drive version was re-released as part of a compilation called “The Codemasters Collection 1” for the Evercade.
— More on the Evercade release

The game is mostly a point-and-click adventure in which items must be collected and later used in specific locations in order to progress.
Cosmic/Linus is directed during much of the game with the use of a cursor and written commands.
It also includes numerous short platforming sections, as well as other mini-games and puzzles.

Each major location of Planet Linoleum has a teleporting device which can be activated using a card, but they often leave Linus with a side-effect, required to complete a puzzle.

To travel between adventure sections, Linus goes through arcade sections where he has to reach the other side of the level, avoiding free falls, enemies and collecting Cosmic Candy.
After collecting 10 Cosmic Candy, an extra life is awarded.

Passwords are scattered at key locations.

All but the NES version includes a two player mode named “Pie Slap”, reminiscent of “Armour Ambush” for the Atari 2600.
While the Master System and Game Gear versions are similar in graphics to the NES version, the gameplay is closer to the remaining versions.
In the Amiga, Mega Drive and MS-DOS versions, the art style is different from the 8-bit versions.