Really liked this! Nice mech, robot, and turret designs, and cool particle effects. The background song was also awesome, it really captured the old school mecha anime opening vibe, so great job on that! Flight felt good, though it would be nice if ascending and descending were a bit faster.
I did find the amount of enemies overwhelming, but I figure that's kind of the point, and I eventually settled into a rhythm of flying around long enough to shake the flying drones off me, getting close to a turret, and full on blasting it with both guns. I also couldn't figure out how to buy the other weapons. Even after getting enough gear points, clicking on them didn't seem to do anything. It'd be cool to see the other weapons, but even with just the machine gun, this game is still an awesome entry. Great work!