Buttons: Use arrow keys to move the Hunter and click to shoot. Press the space-bar to bring up the upgrades. The upgrades cost some of your score. Press l to see the high score. Upgrades: The red one costs ten score and makes you shoot faster. The yellow one costs twenty score and makes it so that each duck you hit will give you two score or three, it does not have a limit so you can keep pressing it. The blue one makes you move faster it costs five score.