The game mechanics are very good but the game as a whole doesn't work for me in its current state. It's possible to make cool elaborate robot-killing mechanisms, but the game does not reward creative strategies. It's easier to use a simple strategy like placing walls for every robot or letting all the robots die to a single mine. The map is so big that the player can do these things forever without trying to use the other structures. I think the systems in the game have a lot of potential but the overall game is confused about what kind of gameplay experience it is trying to be. The game feels like a sandbox because the map is so big and the player can place infinitely many things, but it also tries to have stakes by making the player restart when the human dies or a robot survives. I think these two elements clash heavily with each other.
You have already created some excellent gameplay mechanics and there are many directions you could take this game. Very cool concept and the art is good. I think updating your audio and adding simple sound effects to go a long way in making the game more fun. I gave 5's in creativity and art.