prototype on the theme of alone.

Ideally, you could collect the green lights. These represent the positive experiences in life. The light you control grows bigger. However there are also red lights perhaps representing bad experiences. When you collect these, they begin to form a shell around your light and your light becomes smaller. This makes it easier to block and avoid any kind of experience. As you get bigger, it becomes harder to avoid other lights. If you collect too many red lights, you disappear. If you form the total shell, you cut yourself off from the world. If you get big enough, you can break out of your shell. Otherwise, you just run out of time.