Not bad.
I dont see a problem with advertising your game on newgrounds. But is good to be aware of what is already out there. Not to mention it is almost no trouble at all to find a game as good or better than yours for free, forget paying $20 dollars or whatever you wish to charge.
It might be wise to refine the graphics and expand on the upgrades a bunch. Then I might be willing to purchase your game. But as it is it feels too limited. It has potential, it just isn't there yet.
Fun but...
I'm gonna treat this like I do most "Play a tiny bit here then download the full one from my sponsors hyuk hyuk!" submissions. Half the game, half the score.
This got front paged because...?
Now, don't get me wrong. This game is cool and all, but it still needs work. Yeah, I know. This is a "demo". but to be honest, I dislike demos more then anything else. (asides from spam flash, of course.) the music is good, the workshop was awesome, but the game it's self was... Kind of empty. It needed more of a story, and the instructions were very confusing. I had no idea what I was doing when I started playing.
All in all, I voted three. It's plausable, but it needs work. In my opinion, It shouldn't have gotten front page.
It was a decent game.
Fix the A.I, I gave it a little test and I let them have a clear shot at my HQ, but instead they just dicked around and shot at random objects.
Great Potential
It has great potential it would be good if it was the entire game and to comment on what Crankown the AI really needs some work they don't even try to go after the base also you may want to make it so the player is able to switch weapons midgame to deal with different threats. You may also want to add another enemy model because the 3 that are present get kinda boring. Great game though