This becomes insanely chaotic very quickly and I love that! Definitely a perfect fit for the theme. I love the simple, clean aesthetic you've got, and the sheer number of bullets onscreen at any given time was thoroughly entertaining.
I found that I had a huge amount of money from the start, so was able to buy plenty of upgraded turrets early - could be interesting to have a more limited supply at the start, or a different gameplay mode with a fixed amount if you were to iterate on this.