Mediocre
Game play- The game play got kind of old (let's face it, that is the most important part). I found the combos after a while (they weren't mentioned in the tutorial, at least not that I noticed. I went a while with just a heal spell and the U key) and they were a little refreshing I suppose.
Sounds- Not bad at all. I like the epic music, and the minions high pitch screams.
Graphics- Well the actual graphics were not the worst I have seen. Some improvement wouldn't be bad, but I wouldn't say necessary. It would be nice to have a village for a background. Or windmill. Or totem. The generic backgrounds were weak. Also, the font. There were a few words that I could not determine what they were at all. The font looked nice one the words I could read, but something clearer would be better.
Story- I never saw any humans. Maybe they came later? What's his name (legendary warrior) looked human in the beginning. Also, I thought the undead would be better during an eclipse. Just me. It wasn't too bad, it was a classic good vs evil from the evil perspective. Overall I liked it.
Bugs- 1. My Character always said "level up" with an arrow pointing to the stats screen. That was annoying. 2. Maybe you meant for the screen drag to go the wrong direction? I guess it isn't technically a bug, but it was strange. Also, it always went right back to the character. I wanted to check out the world.
The store- I didn't like it, not because you had to pay money (well... I didn't like that either, but I understand it.) but because it never worked. I could never get my free item, much less pay for one. Also it took forever to load. Also... would an undead super-warrior really go to a store?
Also, it might be good to have it possible to be only a spellcaster. That would be pretty sweet. I didn't feel it was possible because the character would be too weak.
Overall, it wasn't too good, but not too bad. It doesn't deserve a zero though. I enjoyed it for a while. Sorry if I pointed out a lot of negatives, I was trying to be constructive. There are positives that I failed to mention.