You are a child who clicks himself to earn more children. Press 1 to get Apple, cost 2 money. Press 2 to get Cookie, cost 10 money. Press 3 to get bread, cost 50 money. Look at the food list to get more. The numbers in the food list is what key you press to get that.
If you have less than 1 hunger then you die. Otherwise you do not die. Even it is a clicker game, it is not mobile.