The game helps the child to overcome his fear of the dark, in the same way the routines that contribute to the good sleep of the children also help to reduce the nocturnal fears can be (that begins with a bath and a story), you can also avoid the things that increase fear.
Do not make fun of your fear or belittle it. It is also not appropriate to force him to do something he does not want in the dark, even if it is with the supposed purpose of overcoming his fears, or threatening him with the possible punishment of locking him in the dark in his room.
On the contrary, we must congratulate him for his gestures of courage. This demonstration of affection will propel you to overcome your fear of the dark. I have practiced it with my nephews and it really helps to do it. Blessings