The idea of the game is to shoot flying birds. The player would be with a shotgun (or different weapons) in the bottom center of the screen, waiting for the birds to fly across the screen and should kill them by touching the birds on the screen. It should have different kinds of birds, with different kinds of attributes (like speed, more health, flying in wave style, etc) and they would pass in waves, making each wave harder than the last one. Each level should have a couple of waves. The game should be entertaining, dynamic and fast paced so it wont bore the player. Eventually the player should be able to unlock different weapons, with different types of shooting so it can kill the birds easier.
There should be two game modes, survival mode and time mode. In survival mode the player will keep playing until the "lifes" run out, meaning that too many birds were not shot down. In time mode the player should complete each level by killing as many birds as needed before the time runs out.