Tried to over-complicate a very simple game
When I was reading through the instructions, the 4 "chapters" give the impression that this game is going to be really advanced and complicated; something that contains rules you could not work out easily for yourself!...
...But in the end, it turns out to be pretty much just a "whack a mole" game. Click on the turrets when they appear, and occasionally click to buy a new tree. Very, very simple. There was no need for such an over the top tutorial.
In fact, even after reading the tutorial, it does not even prepare you in the right way! It took me a few minutes of playing before I realised I could shoot he enemy bullets as well as the turrets!
The enemy factory design was also fairly poor. You spend the majority of the game watching their defences gradually build up, then at some critical level your army demolishes everything rapidly.
My army actually reached the main factory before they were "supposed to" (when the final nuke weapon is fired at you), and destroyed it. Twice. But due to your poor programming, the factory's life just refilled, and was not destroyed. It seems you only intended us to destroy the tower once all of your weapons had been brought into the game.
Overall, this game has not been thought through very well, at all. It was fun to play for a while, but I doubt I'll be coming back here again. There are too many flaws, bugs and limitations to this game.