You can't. Prince of Persia was originally a simple platform game where you had to save the princess. They added time powers in the newer ones. There is a universal constant that says: Any movie based on a computer game will stink. Its a different media...
I never played the game so I do not know how closely the movie resembles the game, but basically it is about Prince Destin attempting to prove that he did not murder his adopted father, the king.
The movie is about a prince and princess who must stop a villian from destroying the world. Movie editors get paid a lot to put in only the necessary parts.
