You automatically spawn in the red cage, where no other shark can go. At the beginning, you are a small shark that can only eat yellow fish. As you get more points, you grow, and bigger and meaner sharks spawn in the purple zone(if you touch it, the game ends). Grow to be capable to eat more fish! Each enemy has an attack power. If you touch one, and not able to eat it, the enemy attacks you and reduces your health(Notice: When you get to the final level up for your shark, you get 15 health. But it will not regenerate to 15.).Get into a portal to go to a different part of the ocean, where there will be a powerup! Powerups deflect enemy attacks, but once you use it, it will never be available again. Good Luck!