At the title screen, press Down + Y to record from the microphone. Press Down + Y at the title screen again to replay the captured sounds.
Completion bonusesSuccessfully complete Story mode to unlock the "Sound Test" and "Another Story" options. In Another Story mode, you play as a robot trying to get the rival girl.
Bull Survival mode optionSuccessfully complete Scene 8 to unlock the Bull Survival mode option.
Seashells Time Attack optionSuccessfully complete Scene 16 to unlock the Seashells Time Attack option.
Snowball Chase Time Attack optionSuccessfully complete Scene 23 to unlock the Snowball Chase Time Attack option.