I also keep randomly getting killed by some black sludge
The games simple. You grow kobolds, either have sex with them or make them have sex, make more eggs, and when the clock gets close to the red-line use the bed so you don't die. you can make kobolds more valuable by using the grinder to grind up fruits to 'enhance' certain assets of the kobold that eats it, or you can enhance the production capacity using the fruits. Your farm, your choice.