Besides the other points already brought up regarding this, 2 hours is just too short. Games like this often have long startup times, long intros, etc… and it’s just not enough to get a good impression of the game. At least with demos you get a good vertical slice preview of what you’re getting into.
If you have root you may want to use something called ACC (Advanced Charging Controller). You can use its official app, ACCA, to install it. Very customizable.