Heya, you obviously spend some time developing this one so let me give you an as complete as possible review.
First of all, I liked it, great game. Second thought... Did you not get a sponsor on this one? blegh... that sucks:/
Ok so I liked it. Gameplay is solid and so is your coding. The many upgrade/unit options are great and give you an adventage over similar games. I'm not to sure about the balance of the game though. It feels I spended a lot of time on level one and blitzkrieged through the rest (playing easy orc). That's just a minor thing I wanted to point out.
The main dragon in your game is the design and art. I thnk you tried your best here to, but tbh, I don't think you've got a great eye for it (I'm not claiming I have). It really putted me off at the start but I realized soon the rest of the game was tight so I stayed. Still... some players/(sponsors?) prolly leave sooner.
Anyway, I like it, gonne fav and try the other races later.
Oh yeah, make more medals easyer to achieve. I completed the game and only got one medal? YOU BULLY!