Cocoron is a platformer released exclusively for the Famicom. The game lets the player create customisable characters to play with. Each created character has their own strengths and weaknesses depending on the components chosen. Levels can be played in any order and consist of entrance and exit sections. After getting through the entrance section, the player must beat the level boss and then go through the exit section to finish the stage.
Gameplay involves navigating the levels, avoiding obstacles and enemies while collecting power-ups and items to aid the character. The game's unique feature is the ability to create and customise characters, adding a layer of replayability as players experiment with different combinations of components to suit their playstyle.