Hello, I'm re-playing the demo with newest version and I've noticed there's no option to use computer? I remember I could do that in my room, but now not? Is it intentional or it's a bug?
Have you used the decorate button to add the computer to your room? In this demo, we have given it freely at beginning of game. You just need to put it in your room :)
(In the final game, you will need to purchase the computer on your own at the shopping mall)