I praise you for your contribution to this site with a game that actually has a sincere, truly-thought plot. Most games, unfortunately, have none what so ever. This deserves more commendation that it has been given. Thank you for creating a spectacular game.
This is a very good game. You did everything well from the variations of attack as well as death. My favorite part of the game is when you upgrade a unit you can actually see the change, most games don't do that. It deserves above the rating that it is given.
You die a little bit to easily and some zombies move way to quickly then corner you. The infinite spawn is a little bit to quick, but other than those three it is absolutely amazing.
How do you get more units? I got to the last level and I only had the Magic Tank, Black Night, Goblin, Zombie, Centaur, Flying Armor, and Bombardier. I couldn't seem to get more than the meteor, comet, and arrows either. Most of the units, even fully upgraded could never beat it. I need some others, but don't know how to get them...