Sorry to say this but the game was pretty mediocre. The graphics were great (although slowed down my laptop), but it kind of lacked substance.
I suggest more information for the towers, like damage, range, reload speed. The fact that the selling price isn't affected by the upgrades is a bit weird, as well as the same reward for different zombies.
With a bit of polishing it could be a very fun TD, the idea of having both turrets and different squads was interesting.
First thing's first: The choices you added in your game such as deploying cheap troops or mines anywhere makes it easy to be exploited. I think you should work on making the costs for such troops much higher. Other than that the upgrades menu is boring and hard to fill, also the things that have already been said, you can spam the beggining area with snipers and mines and zombies will never reach the end. It's just a boring wait until they are all dead. Fix the bug where you can use hotkeys to deploy things even if they are on cooldwon and make more speeds for the game (it takes way too long) The graphics are decent, now invest time in game mechanics/gameplay.
Ummm... Its aa good game if you like tower deffence... but its kind of boring because it takes like 10 mins for each round if you want to play a good zombie game play The Last Stand 1,2 Or Last Stand Union City (Best one)
Its shows promise, but for some reason on the second tutorial it won't place my squads.
It's still telling me to click to set the direction of the squad after I've clicked, and the squad don't get dropped in. If I try to place another squad the first squad disappear.
It was an okay game. Very short and not very challenging. Shotgun turret was the only turret worth building. Machine gun did far too little damage for a single target attack and missile was useless without a wall of riot police. Can't say I cared for the restrictive placement of turrets and would have preferred being given a handful to start with and have to pay for additional placement pads to be setup. Have fewer pads to start with on hard. Found the abilities overly costly and weak too since a turret or unit is a better investment in damage even in an emergency. Landmines were pretty much a 'just in case' thing for the exits.
This game needs to be optimized. It lags far too much for such a simple game even when the field is flooded. My Computer is a beast, there is no reason for this problem even on an average computer 10 years ago.