Not bad until later levels
It started pretty fun until later levels. I'm just wondering...why do you have a timelimit for killing the enemies? A nuke was 2 pixels away from blowing up when it says Times Up I had .14 seconds left and there was one level where I was in a deep pit by a nuke and the enemy was in a deep pit by a nuke. No one could shoot the other.
I like the way that you can upgrade weapons and the variety of defense and attacking things.
Hints and probably spoiler...
How to beat this darn game
Start the game and place your bunker next to the other bunkers. and upgrade your pellet gun. Always upgrade pellet gun to the max when you buy a new bunker. Buy the homing missles when you have the money to. Then upgrade it to the max. Keep buying seeking missiles and upgrading it until buttons 2,3,4,5 are full of it. When the enemies get tougher you need to change tactics. Buy two EMT and upgrade it to the max if possible (place at 4,5). If you can, buy two more bunkers. They can act like decoys until later. You should put all your bunkers together at a far end of the map now. When you have the moolah, buy a MR Nuke and upgrade it to the max. Place it at Bunker 2 or 3. Then buy more and put it on the same bunker. Always place your seeking missiles bunker between the enemy and 2,3. So the placement should look like...Enemy----1-2-3. One of the bunkers is useless but if you have cash, buy two EMT for it just in case your 1 bunker dies. Buy two Time Delay so if only your 2,3 Bunkers are alive, you have enough time to let the nukes load and launch toward the enemy (only launch two at a time because the enemy might do EMT).
That's about it =O. Hope it helps, if it doesn't PM me saying that I suck bollocks.