I like this game, but I feel the weapons need a description as to what makes them unique. The first few are obvious (machine gun, split shot, missiles*AOE*, lightning beam) , what about about the others? Is the purple one just a more powerful machine gun? I'm assuming the green beam is basically an instant kill while the nuclear icon is just another aoe weapon?
Aside from that, it's a pretty addictive game overall, with just this small addition I would give it a 5 star score.