Overall the game is well made and has a nice feel to it, the sound effects and music used fit the theme well. The aiming and movement felt good, the way the crosshair was implemented definitely adds to the feel of the game. I'm not sure sure if this is an itch specific problem but while the player is underwater the underwater effect (the screen being slightly tinited blue) has a border on it's top and bottom where the effect isn't present. Not much else I could find wrong with the game, but maybe adding a score or ducks defeated counter so that the player has an indication of their progess.