It's unbelievable how many people think the game is rigged... Simply ask yourself people : why put a rigged game online? Simply why? Lack a motive here. Players often prefer easy games, so if I would rig a game I would rig to benefit the PLAYER not the comp. If you were the developer, why shoot oneself in the foot and generate such a flood of hate, simply for pleasure?
This game s great, but the developer should create more incentives to use the other types of units, like making certain units more vulnerable to certain monster types
just a detail, but an annoying one. when you generate a lot monsters using the shortcuts (keyboard) and on the RIGHT of the screen, and when your mouse is IN the right circle, it generates monster on the left.. weird and can cost you the victory!
I believe the ugly and white "MessageBox" that comes sometimes during the game works against suspension of disbelief (http://en.wikipedia.org/wiki/Suspension_of_disbelief). The background could be made slighty transparent to adapt to the general theme of the game.