I see you used the Kenney asset pack for the basis of your turrets just like I did. Very cool tower defense game I really liked it. The levels difficulty, maps, and enemies all seemed really well made. I also loved the music and sound effects. A+ game for sure!
I just have to know, did you by any chance get inspired by Club Penguin's System Defender game? It has the same feel to it/concept. If not, then my bad but I thought maybe you did xD
Great job!