Copyright law gives you control over how your content (texts, photos, videos, etc.) can be used, by whom they can be distributed, modified, etc. Sometimes, online services need your permission to perform certain tasks with your content. That's why they ask you to grant them a copyright license. But sometimes, the copyright license is so broad, that your content can be exploited by others without asking you.
Physics also plays an important role in the experience. Timing, movement, and object interactions create puzzles that feel dynamic instead of predictable. Sometimes the obvious solution isn't the correct one, and a little creativity can make all the difference.