Make a Tamagotchi game, a virtual digital pet.
So when you start the game, you select the name for your pet, and you can choose a pet of your likening (I want a babyblue one that has big cute eyes, and cat ears and it should be furry lol).
So then you have to take care of it, else it dies and you loose.
So you must play with it, else its gets bored and depressed, but you shouldn't play with it too much, else it gets tired and sleepy.
Also, you cant just play with it, because then it becomes stupid, you don't want it to be dumb, so you much teach it stuff too.
You must not forget to feed it, else it gets hungry and cries, and if you don't feed it, it can die, because it will starve.
