This game reminded me of Mindustry it brought back memories of that game
One suggestion: instead of showing with text where I can or can’t build structures, just display a square (or any shape) under the mouse make it green where building is allowed and red where it’s not. Honestly, I was just spamming clicks all over the map to place my structures quickly.
I got to wave 50, but then I got bored since nothing new was happening!
Overall though, I liked the game ❤