You must descend 112 levels, blow enemies into bubbles, pop them, and collect the goodies left behind…basically survive. It’s very easy to pick up.

The B Button blows bubbles and the A button jumps.

When you pop a bubble, either by jumping into it, or pushing it, it pops. If you blow a bubble, then jump on it while holding the jump button, you'll hop on it. This is useful to access parts of levels where there isn't a way to get to those places.You can continue to hop on the bubble until it pops.

If the bubbles are close together in a group, and you pop one of them, a chain reaction ensues and they all pop. This is something to remember when defeating trapped enemies.

[Defeating Enemies]

Defeating enemies is easy. When you blow a bubble, if the enemy is in the range of when the bubble is forming, they will be trapped in the bubble.
Once the enemy is trapped in the bubble, pop it, and the enemy will be defeated.

It will bounce around the screen a bit before landing and turning into a bonus item. One of dozens of food items.

[Special Attack Bubbles]
Attack bubbles come in three different flavors: water, lightning, and fire.

Water Bubbles: When you pop these, a wave of "water" will flow from the bubble. Any enemy that is in the path of the wave will be killed. It first appears on level 5.

Lightning Bubbles: Popping the lightning bubble will cause a group of lightnings to travel across the screen defeating the enemies. These first appear on level 17.

Fire Bubbles: These bubbles are hot stuff. When you pop them, a small flame slowly falls downward. If it reaches ground, it’ll spread out and any enemy that touches the flames will be defeated. They first appear on level 4.

[Gaining Extra Lives]
Along with the special attack bubbles, you'll see different colored bubbles with letters on them. These are the E-X-T-E-N-D bubbles.
When you collect all of the six letters, you’ll get an Extra Life.

Good Luck!