Thanks for the feedback! For now, I can't find a proper way to rotate the camera unfortunately, as I had put the limit of how far can the camera move, rotating the camera impacts the translation in x and z axis so it can go wrong way from the map that I originally intended. This can be fixed in several different ways I think, but the implementation of basic RTS mechanism such as commanding unit(s) was my main priority.
Yes, I think I can implement some sort of "AI Controller" control and command its units behind, and there are also some of the issues I have to fix, I will update the game and share the source code after the voting is over, hopefully these issues fixing and implementation of the new idea that you brought out will take less time to do, as I have some academic stuff I need to settle first.
I'm glad that you have fun by playing the game!