Better than you think
I love the first Xenotactic, but lets face it, it was a blatant code rip of desktop tower defense. (I preferred Xenotactic). This game, is actually an original game and I don't think people understand that. I have very few gripes about the game. My only possible suggestions would be to. I think the first game was harder, especially with the flying levels, they would just end you. I really like the balance in this game.
1. Start the first level off a little easier for first timers.
2. Fix some of the big cannons, the Mauler says multi hit as a special ability but only hits one target at a time. Whats up with that?
3. Make upgrade costs more proportionate to the weapon. Costs the same to upgrade my gatling turret as the mauler.
4. I kept getting a few waves of like one weak enemy on Stage 4. I think you could up a few waves a bit to keep the difficulty up.
5. Laser turrets often miss which is very annoying when you've set up a good defense and one aircraft slips through your net.
Overall, Great game, I'll keep on playing it!