Your game has potential as a clicker, especially due to the unique growth mechanic. The basic concept is great, but there are a bundle of flaws:
Content: The game is still small and needs some updates quick if you want to get some attention
Ease-of-play: The tutorial isnt enough to fully grasp what the hell is going on. This is quite different than most clickers and could do with a slightly more in-depth and (larger print) explanations. When scrolling the mouse over a unit it should show its total faith, this could help checking progress immensely for zealots and cannibals... Allow a more in depth control of the buildings (and add more buildings while youre at it) so we can allocate exactly how much of what goes where, so that we can balance out where the zealouts/cannibals go to and optimise growth.
Goal/Plot: There needs to be some kind of carrot dangling for gamers to reach for if you want to keep our attention. Adding more upgrades and achievements will fix the problem instantly. For now theres no point playing past lvl 17/18.
I'm not sure if its on purpose but zealouts kill cannibal corpses... This kind of sucks since it doesnt allow the Preacher-zealout-necromancer-totem-cannibal growth loop I anticipated, a smmall list of what units can be killed by whom would also be useful.
You should have humans and undead as two seperate growth patterns with their own achievements and upgrades, rather than undead being a higher tier than human.
I'm no expert so this is just personal opinion, hope it helps!