Very fun, I didn't beat your high score, highest i got was 16mil.
I sometimes felt like I wished the shield arc was a bit larger, or that you could move little faster while not spinning. But that may be just me being bad.
Thanks for taking a look at my game, and for the feedback! Yeah, tuning the difficulty is always the hardest part of these things; it's really easy to get used to something when you've been testing it all week and accidentally make things too hard. But I hope you enjoyed it anyway! And 16mil is a solid score, kudos!