lol

back to topic:
+add a water shader

+make the ducks ride on the waves (up down, left right aso)

+get rid of the your turn my turn thing

+instead let the opponent in the back really aim and fire at the ducks...may the better and faster one win...a reload time for the weapon would be still ok (1-2) seconds

+make the duck interact with the player (quak, flap with the wings or dive up and down)

+get yourself a nice artist and polish the game up (there is way much more possible) and this can make the difference between 100 units sold and 5000 sold. even if it may cost a little bit its worth it

cheers and good luck!