Doesn't deserve MOST of the crap it's getting
First, a message to the haters that are voting it down just because there are other games like it: Welcome to Newgrounds. Top-down shooters are a staple of the site, and frankly, most of them work exactly the same way. Get over yourselves.
Personally, I thought the face system (having 4 weapons equipped at once) was pretty cool, and the artwork is really suited for the genre.
That said, there WERE issues. First, and foremost, the game is wayyyy too prone to lag. I changed the quality to low, turned off the sounds, and optimized my CPU, but something in the programming is still super power-hungry, maybe the clutter of having too many complicated enemies onscreen at once. And having the gun-toting robots fly all over when they got hit was funny at first, but got really annoying when they would just fly into ME. I got most of my kills in one level by just having enemies slam into me, decreasing the fun of the shooter. And, while I enjoyed the face system, cycling through the weapons on at a time during combat felt cumbersome. Lastly, the lack of a pause feature in a game like this is ridiculous.
My main suggestion is to incorporate an inventory system into a pause screen. That way you can change your entire weapon loadout at once, without simultaneously worrying about dodging enemies. Also, get rid of those spinning enemies (or make the action smaller) and see if you can simplify the code to get rid of the lag, since it's not the graphics alone.
Overall, this is a solid game with some interesting spins, but it needs to be polished to make it more playable. Good work.