There are a few things that could take this game to an easy 4-5 star game. First of all, multiple hits on the same target should do damage, not just the first round. Second, there should be a reloading mechanism in the game to add more of a challenge. This game also needs something to build on, upgrades or the ability to change/add weapons. A flak gun, machine burst etc as well as piercing rounds, fire rounds, auto-fire, burst rounds, secondary turrets etc. This is a good idea, but should only be a starting point, not the finished product.