Atoms carry on existing, mind and consciousness get wiped. Individual's contribution to the world will remain. But if the whole universe is a single evolving process, separate "I" is an illusion. There is only the whole, observing itself through billions of avatars. Death will close one aperture, but new ones open all the time. We get born again and again into the world we left to ourselves in the past. So if our actions make the world better, we'll end up in heaven. If worse - in hell. This is karma.