TentaDrill

Grow stronger as you swim and fight your way through the levels.
Developed by: Armor Games Classic (Flash)

Make your way through the treacherous deep-sea levels trying to avoid any thing that looks menacing enough to hurt you.

As you gather enough shells and experience you will grow stronger until you are the one the others creatures have look out for.

Instructions

Use the arrow keys to move around.
When you are at a higher level, press Z to shoot and X to use your drill.

You can replay levels at later stages to try and beat your score.