for one thing, the cannon take too much time to charge. the fired projectile never goes where you intend for it to, its range SUCKED, and the menu took to long to load!!! i just want to play the game goddamnit!!! i don't give a FUCK about who made it and that shit- the machine gun is NOT a machine gun- just a rapid fire pistol. furthermore, when an enemy goes below you you cannot shoot it. I hate that. that's what ultimately killed me later on in my game. the plasma cannons are the only ones that actually DO anything.
sorry for beong so harsh but this is my honest opinion on this game. >:3