Really interesting, lots of things going on under the surface. Liked the micro-managing of three things at once amidst the bullet hell gameplay, adds a lot of depth.
The keyboard scheme (Q + E, and A + D) make it harder to control both the shield and the larger circle / base at once, e.g., to move the same direction -- this makes the game difficult, as I can't really position my fingers to control both the shield and base at once which I think would make the micro-managing mechanic even more interesting. I don't know if that was intentional.
Thanks for sharing!!