Play as 5 different sharks, eating your way to evolving into a more powerful shark, then on the final level battle a boat for sea supremacy.

Eating:
- Scroll over other fish to eat them.
- Fish try to run away from you and most fish need bit twice to eat.
- Most fish are worth 0.5% to 3% of your needed level progress.

Evolving:
- Each time you make it to 100% you evolve to the next shark until you are on the fifth and final shark.
- Each shark has more hit points than the prior shark.
- On the final shark, you first eat to 100%, and then rather than evolving a boat comes into the frame which you must battle and beat.

Dying:
- Avoid spikey fish, fish with a neon glow around them, dangerous barrels, green bubbles from the dangerous barrels, mines, torpedoes, spears, bullets, and other harmful obstacles.
- Your health bar shows how much health you have remaining.
- You can restore health by eating smaller fish with a heart on them.
- If you die you start at the beginning of the game unless you ate the goldfish in the middle of the level near a treasure, which acts as a save point.
- Some levels have multiple goldfish checkpoints.