One of the best browser shooters I have ever played, here is some nitpicking:
-Story: The upgrade descriptions mainly make up for its absense, but it could have been more. The environments and enemy variations are great, but by the end you are way too OP to be fazed by the much-anticipated final boss.
-Signs of power: What are these for? You get them in the first few broken items, so they are not incentive to break more stuff, and they seem useless.
-Glasses: They can be upgraded in the Beast side, what are they? Not explained.
-Text: Too quick for most.
-Plasma rifle: I want to buy patrons 10 by 10, not all at once!
-Achievements: There aren't any! And I beat the game without losing a life, and how about beating it with a pistol alone?
-Beast: Its upgrades are a little OP, especially the resurrection, which lets you have 4 lives. However, these upgrades have made it possible to play with the pistol again in latter levels! Brilliant balancing!
That's it, just make more.