exploit to play semi-full game while only playing demo

after the time limit expires it gives the player the option to view the world. If they choose to do so it puts the player character into a pseudo adventure mode, however it still gives the player the option to change their game mode; If the player then chooses to change their game mode to what i will now call "true adventure mode" it will act accordingly and play as if in that mode, but if it is changed again back to survival it will play as a normal survival game with some small restrictions of the demo but the timer in the corner will stay at 0:00.