I have a similar experience than Ozymiandias, until I understood the best places and order to build. I was also about to give you the bullets velocity feedback, as Hardik Prajapati commented. Oh, and I tried the slow but strong turret once, and never built it again, didn't seem worth.
Nontherless, was a good tower defense, I really like the ideas you talked about at Discord, that would make it more different of others games on the genre.
Great work, keep going!