Good, with a few flaws
Good Defense game, but there were some improvements that could have made the game a little more fun.
First, the junk that you collect to get money is a little hard to see, if you could give it like a kind of ilumination around it, like it was lit up, it would be easier to see, also, make them so you don't have to go pretty much directly through the middle of the junk to pick them up, when you are looking across the screen at the enemies, it sucks when you have to collect cash 3 or 4 times to actually get it. Also, when an enemy is dealing damage to your base, it should be denoted somehow, not with the enemy just sitting there, maybe make some sort of sparks or something when they deal damage? The Uzi should also scatter the shots a little, as is, the flamethrower, which is cheaper, seems a little more effective than the Uzi, since the Uzi only shoots in a straight line. Aside from that, just more weapons and improvable statistics would be nice, also, maybe allow upgrades for the automatic defense systems, like increased speed.
Good game though, a little like the defend your temple game, but good enough to rise above comparison, I can't wait for the third one.