Other Koopa shells that are touched by the red stars are also destroyed and turn into red stars themselves, allowing you to chain multiple kills for high scores. Shooting a Koopa shell causes them to be destroyed and turn into red stars that scatter around. While this may sound simple enough, the Koopa shells will be flying around the screen at high speed, making it challenging to avoid them while trying to hit targets. The objective of Beetle Mania is to shoot down as many Koopa shells on the screen while avoiding getting hit to get high scores.
Unlike most mini games in Super Mario RPG Remake, Beetle Mania is accessed via the game’s menu screen (likely a nod to the mini game being playable from the handheld game device you buy from the Toad).