It sounds like this game works best as a co-op. I'll see if I can get my son to play with me and introduce him to some proper games like yours 😀.
Been thinking about it and I even considered adding some kind of adaptative difficuly. As in "if you die, enemies spawn a bit slowlier each time". But yes, the game was conceived co-op from the beginning! One can try to free rats while the other one takes care of devices. It's doable solo, but much more difficult ^-^