Keep track of the number of button presses you need to make and then collect the hearts when the time is right. You’ll no doubt die a few times as you let Koopa Shells rack up, but that’s okay. At full health, it takes five button presses to revive a beetle. When you collect hearts, that number goes down. Each time you die, you will need to press the button one more time to successfully revive it. If your beetle is hit by a Koopa Shell, it will die and you’ll have to mash the button to revive it. Let a ton of Koopa Shells fall to the ground, and when enough have accumulated, shoot once and watch the score counter increase a ton! The shells you destroyed will eventually drop hearts, so try to pick up as many of those as you can.
Basically, you’ll want to steer your beetle off to the side and wait – don’t shoot anything. Instead, the real way to rack up points is to have a Koopa Shell you shot bump into a bunch of others – the score increases for each consecutive hit. Each one is worth a minuscule number of points individually.
The object of the game is to score as many points as possible, and to do this you have to shoot the Koopa Shells that drop from the top of the screen. In Super Mario RPG’s Beetle Mania, you play as a beetle who can shoot stars forward.