Thank you for the compliments! I also really love the concept of the turrets, and there are actually a lot of expanded mechanics that I didn't have time to implement. Regarding what you disliked, I think it’s a bit of a dilemma. If enemies don't get stronger, the game loses its challenge; but if their scaling matches the player's upgrades too closely, it definitely weakens the sense of progression.
I hope I can figure out a design that balances both. Thanks for pointing it out—it’s definitely a problem worth diving into!