It's boring, it's repetitive, it's nothing we haven't seen before. In the end, the enemies are so powerful and grant so much bounty that I had a complex maze consisting solely of war cannons, slow pads, and four teleporters. Everything fully upgraded, and it still took AGES to kill even NORMAL enemies. Even more so than the bosses. After about level 60, there won't be much difference between bosses and basic enemies - in fact the basic enemies often take longer to wipe out (the entire wave, that is). When I stopped, I had almost no other towers than fully upgraded war cannons, and I still had... How many BILLIONS of extra credits?
The first level with Blue... No matter what I do, Blue finds a way to counter it. Blue isn't cautious - Blue is just like an elite version of Red with an unfair advantage of A: Easier access to systems and B: +2 on his starting system, where I only have +1. This means that he can deploy twice as fast as I can. BALANCE.
Your nut is missing a screw, mate. This is the weirdest game I've seen so far. It's also boring, repetitive, and we have all seen something like this before. Nothing new here.
The imps are pretty useless.
They have slow attacks, they have low health, and most enemies can quickly destroy them before they deal any damage. It's not even a "strength in numbers" scenario - because the imps are easily taken out en masse.
Enemy titan units are gay. The dragon obliterated my entire army with one single breath attack. Heroes included. It took out the few remaining long-ranged units with either another breath attack or a minotaur/imp spam. FIX. IT. NOW. Make it less OP and more beatable.
Also... When I start a new game after dying (with a 00000000 score, despite being on wave 20), I instantly have access to the nuke, the nuke shelter and all the guns I bought in my last game. The zombies also keep spawning in the same way as when I lost the last game - They don't start with weaker zombies and slowly climb up to stronger ones. I just get everything they have straight from level one.
I apparantly got killed by my own nuke, even though I had purchased the nuke shelter. I also killed anything thrown at me with extreme ease as soon as I got the triple-rocket-launcher. Nothing proved a challenge - and from what I understand when reading other comments, the rocket launchers are the worst weapons in the game... So if I can kill everything with one of the worst weapons, this game is SERIOUSLY imbalanced.
There are also several glitches, among others: A large zombie died when it entered the screen, and kept looping the death animation - a fast zombie went past my house and is now looping its running animation next to the house - I was killed by my own nuke, despite having a nuke shelter.
All in all, this game is imbalanced, too easy, too glitchy and too damn repetitive.
You should also add an option to enter the buy menu whenever the player needs to, instead of waiting till morning every time you need a new gun. This is a life-saver.