The fun factor is definitely here after the first wave.
What I liked:
-Being able to pan far from the gun and shoot distant enemies by feel is great
-Hitting multiple targets with one well-aimed shot feels good. I enjoyed trying to figure out the best geometry to hit as many as I could.
-The story and theme are strongly tied.
What I would adjust:
-It's difficult to tell if you are making any progress on finishing a target. If there were some indication like a hurt sprite or dying sprite that would help.
-The shell whistling got somewhat grating quickly. Maybe a chunkier sound?
Thank you for sharing your game!