Collect three chests with treasures. To move use the arrow keys. Avoid fish, they can destroy you. To kill them use "z" key. Some fish is immortal for your gun. So, be careful and get the score for bonus lives. You can select Hard and Effects levels; turn on/off Sound in Options window. To watch demo - press "Demo" button. Use "P" key to start/stop/pause. Small/Medium/Big bonus - Score depends on the level number.