Noooo I was on wave 16 and my laptop ran out of battery! It was definitely enjoyable - I'm not sure if it was an exploit but I used the "wave select" screen time to go destroy the asteroids for an early head start on money. I really like the idea of needing to split your time up between staying near the "boy" and exploring for resources and turret upgrades.
I never understood what the "wave select" screen was doing - is that choosing the difficulty of the next wave?
Music is very nice, did you do the art as well?