Pipi & Bibi's is an eroge action-platform game reminiscent of Elevator Action, where the players assume the role of Pipi (P1) and Bibi (P2) entering a series of six increasingly difficult buildings composed of four stages filled with enemies in order to set up time bombs on computer rooms and exit from the area before it collapses from the explosion as the main objective to reveal the picture of a woman.^[3][4][5][6] For each stage completed, 1/4 of a woman's picture is shown and the full picture is revealed once all four stages of a building are cleared.^[6] Getting hit by an enemy will result in losing a live and once all lives are lost, the game is over unless the players insert more credits into the arcade machine to continue playing.

Along the way, players can defend against enemies by shooting their laser beam weapon and depending how long the beam is held on, enemies will fall off to the platform below or out the playfield but they respawn from behind closed doors.^[3][6] Players traverse the stages through stairs and elevators, which can also be used by enemies as well. The player characters can also perform a sliding kick when the elevator door are opening or closing and this tactic can also be used to defeat enemies. On occasions, an "H" coin appears to be collected and depending on the number of coins collected before clearing all four stages, the woman on the picture takes more of her clothes.^[3][6] After setting up the time bombs, players only have twenty seconds to exit before the bombs detonate but if the players characters are hit by an enemy, the area collapses but players are forced to clear the stage once again.^[3][6]