What is the bubble bonus?
It reacts like a shield; Nina is protected in a bubble. It prevents Nina from getting hit by a monster. Instead, the monster gives her a kiss.
What is the bomb bonus?
The player can use it to clear the level of all visible monsters. Within a level, the player just has to press * to pause the game, scroll from left to right and up and down to get to the point where the maximum of monsters are gathered and validate (pressing 5) to drop the bomb. The Monsters become all red and explode!