Good, but unbalanced
Graphics wise, awesome.
Now, for a few gameplay balance issues, the initial unit. The otary vs the pawn. Pawn has 56 hp, one power, and does what 2 damage versus the otary wich cost 2 power, 110 hp and 6 power... unbalanced.
Proto vs hoper. ok. althought slightly unbalanced, the deal is okay.
Spy tank vs trump. You GOTTA be kidding. The trump is a f**kin armored piece of artillery with huge damage and loads of hp, vs the randomly warping spytank with no armor. UNBALANCED.
the list goes on...
Heroes. The idatu hero's gauss cannon is supposed to deal 13 damage at level 1. I got it up to level 5 and still deal 3-5 TO ENEMIES! the mortar had the same problem althought the splash some value in groups. And brs wasn't worth it either. The laser canon was more interesting because of the fire rate.
On the opposite end. Tridalian just wooped, until you met airplaines. Then, they died as the airplaines go faster than the rockets.
Now for suggestions.
1. Fix the idatu weapon bugs. they don't deal the right damage.
2. Balance the damage / hp of same tier units, and make sure they have corresponding powers. (Hopper = seriously less hp, or less fire power) (pawn = more hp, more power, Spy tank = more power, faster warp, and the like)
3. Upgrade anti air weapon and reduce aircraft speed.
4. Make heroes more powerful overall, because the fact that a hero can't take on a tier 3 unit kinda sucks. seriously-.
Overall, the game is good, there is an excellent basis, you just need to even out the few flaws and this will be awesome