Thank you, you are right in basically all what you say. For now content is the key, I posted this as a practice game on January 1st ar Kongregate, and bam! it got popular by the next day and I was shocked... I guess because it is different and I had only 5 units and 3 buildings and you could only play 6 god levels and that was it, so ever since I'm rushing every week to publish stuff. I had been able to upload 29 updates and all that you see here is way better than the raw and immature game it was. So keeping you guys entertained is almost a full time job xD... but I'm really enjoying while creating new content.
Valentine's units had just been published as part of this rushing deployment of new content... I do appreciate your comments and will appreciate more a like in FB, that's my main motivation to keep the game growing with this huge army of artist and game developers I have ☜(˚▽˚)☞ me.
The Zealot is meant to kill the Cannibal Corpse because I wanted players to look for different combinations, otherwise that build you mention will be mainstream.
One option will be to leave the game as it is now and go back to design and create more content with more time available and with better mechanics, but I don't think many players would like that xD (don't know how many though), so before shooting to nowhere I decided to keep a weekly update with small releases and additional units.
Thank you and just wait to see spell level 2 units, I'm working on a new "deck" of units.