Loved the game, the graphics are pretty cool, and the music too (very good for the game style), I felt a bit confused at the beggining, but it's quite intuitive to learn so after a minute I got everything figured out.
The best thing of this game is that it's soooo addictive! I've gotten to lvl 4 right now, and got some upgrades, love the fact that the type of modules increases gradually as you progress.