It is said that if we don't learn from history we are bound to repeat it. Could it be that the actors journey in this movie shows a little glimpse as to the souls journey if we assume that we have a soul? That we only really graduate once we have learned the lessons that are here on this planet and that otherwise we will just get reincarnated over and over and given another chance at learning.
Initially the character, once he realises that he is "stuck" starts abusing his power and sees how he can fulfill his hedonistic desires by manipulating events and people. As he gets bored with himself and his tricks, he discovers the creative principle, and starts on the journey of serving others and contribute to life and thus he starts learning.
So this movie had a strong effect on me and I rate it highly both because it a highly entertaining movie, which is well acted, but especially because of the deeper layer that is there to be seen.
I would recommend the book "The Secret History of the World and How to Get Out Alive" by Laura Knight-Jadczyk, as it explores in depth the idea that life is a school, where we have the possibility to learn.