I ran out of time to try to balance everything/create new waves and test them for balance, and i completely agree that a lot needs to be done to create more dynamic gameplay besides just "running around in circles" haha.
I am hoping to keep working on this in the future, and tweak the waves and enemies, along with introducing enemies with different shooting patterns, and different AI behavior, to hopefully fix that.
Thank you so much for playing my game, and for leaving a comment with great advice/constructive criticism!