Do you like playing with laws of physics? Do you have an idea about what the Law of Reflection is? Light is known to behave in a very predictable manner. If a ray of light could be observed approaching and reflecting off of a flat mirror, then the behavior of the light as it reflects would follow a predictable law known as the law of reflection keeping the same angle. Drag mirrors so that the light reflected from them leads towards the finish mark. Do it and next level will be unlocked and you can keep solving more and more difficult cases. Have fun.