The player controls a mole which digs through dirt collecting various fruits and vegetables. In most stages, the produce must be collected in a specific order, or the player may become stuck and be forced to restart the stage. During the stages, the player must also retrieve a female mole, referred to in the instruction manual as the player's daughter-in-law. When all objectives are complete, the player must leave through the exit. If the player dies, the character says something along the lines of "I'm beat."
Source: Wikipedia, "[en.wikipedia.org/wiki/Banana_%28video_game%29 Banana (video game)]", available under the CC-BY-SA License.