Link to it on steam this game is awesome and is currently $5 - 75% off from the regular price of $19.99. It's a great stategy / tower defense game. Great hours of fun, if you're like me and like RTS's and strategy then this is a must buy especially at the current price. I just got it today and I really like it.
BUY THIS RIGHT NOW. 
Are the graphics any good?
They're OK. Deffinitley not the best but they are decent enough that they won't harm the overall experience.
More importantly, the gameplay is kickass.
Here's some screens:
Hmm i may just look into this, seems as if i have a bit of time till the offer is over, il take a look at the demo and some vids. thanks for the heads up m8
Looks interesting, thanks for sharing. I love defense games!