Hi, I am the maker of the game. I agree completely with you and I will be making a post jam version of this game.
One of the things I wanted to do is make proper keyboard controls for moving and producing ants.
By the way, it tried to fit the theme by making all units act as one. It was suppose to have a story about a fungus infecting ants and controlling them which gave the limitation/advantage of all your ants moving as one. Hence the "only one" part of the game.