why not turning the second gun into a permanent gun with its own mind so it shoots while we collect the energy orbs? or something like an energy magnet to collect the orbs so we can concentrate more on the shooting.
some ideas, just in case you want to make a sequel:
upgrades work for the second gun too so we can have a super gun and a rocket gun or so. and maybe our own troops/minions with upgrades.
well, its a good starter work on it. okay? add an ORB magnet/rare nuke power ups (they kill all enemies that are on screen). its not quite 5 but it's very good. Also make the second gun AI controlled. make the enemies a bit stronger on the first level(s). Also remove that auto gun thing on the top (it makes it to easy). In a different time make multiplayer to make it more interesting! add more levels thats what it needs (add that in a level pack game so you could play classic or the story continues type thing)
~some use full ideas from ionn
Fun, decent. You should get partial points when you die so you can upgrade. Also, why not add an "autofire" option?
4 stars because there is no achievement like BEAT THE GAME WITHOUT GETTING HIT
Can't see which level I exactly was on but it was a good game. Slight complain about the boss. He was a bit lame, only spawning low tier cannon fodder. But the explosions and weaponry where awesome.