Thanks for playing the game.
There is a bug sometimes that hit box of ant stop working. I am not sure why it happens.
I heard a lot of feedback for player to have some form of attacking. While designing the game, it felt like mechs became useless if player can attack by themselves. So we did not implement it. Looking back on it, I think we should have made a player attack like setting traps on a tile and it goes off when ant steps on it.