Overall: It seemed a bit too easy. Going off of the chart in the beginning, the optimal strategy is Bear head, Alligator body, alligator legs. Why would I ever create anything else?
Fun: I never got that into the age of war style games. It's slow, and the gameplay consists mostly of watching things happen.
Innovation: I like the addition of combining creatures, but as stated, Bear-Gator-Gator is the only one I created, due to the stats being optimal according to the chart. Perhaps not letting the player know the exact numbers would be in your favor. It forces the player to experiment.
Theme: Again with my comments on innovation, I like the combining element, but I really didn't play around with it.
Graphics: I love the artwork, and the goofy enemies looked great. The background was really cool too!
Mood: This ties in with how cool the background was. The cool night time colors set the scene for some fun witchcraft/necromancy. Good stuff!
Audio: The music seemed strangely compressed. It reminds me of old flash games, and maybe that's what you were going for? I personally wasn't a huge fan though.
Humor: The combos looked funny, and I like it.
Final Thoughts: I think you shouldn't let the players see the stats, and maybe force them to experiment by making it so they can't make the same creature two times in a row. It would certainly force variety and playing around more with the combo mechanic. Great game!