This is a really interesting concept! It took me a while to realize you had to program the turrets, but after that (and especially once I started using the turn up/down commands) I really liked the concept. I will definitely say the lack of polish is really hard on a game like this, and also personally I think the idea may be more suited to a top-down perspective, so consider trying that out if you want to build on the game more. Overall, love the idea and programming turrets behavior is a super interesting twist on the tower defense genre. With more content and polish this could easily turn into a fantastic full game, I truly think this has heaps of potential! Great job!