In my original plan, I wanted to press the button to interact with the item. But now I decided to change it to interact with the item when the character is near the item.

I have two electronic devices in my scene, a computer and a tablet.

I made the on and off mode of them respectively.

I also created two sets of animations for my characters, one walking away from the camera and one walking facing the camera.

 

This is a video of the gameplay. You can see that the screen lights up when the character walks over to those devices and turns off when the character leaves.

At the bottom is the update of the SAN and POWER. Which are two important values in my game.