Minecraft wiki entry for Demo_mode, associated text: The time limit is 90 minutes of real-time.
The player isn't able to play Multiplayer, including LAN multiplayer. On the PlayStation 4, split-screen multiplayer is possible.
The player isn't able to change Global Resources and Add-ons.
The player is restricted to Survival mode.
The player is restricted from changing Cheats and World Options parts off.
The player is restricted from changing Trust Player Permissions.
The player is restricted from accessing Storage.
The player cannot change the world seed.
Worlds always generate with the seed: 1537846859.
The player is restricted to Infinite world type.
There have been 3 demo seeds, which are 818010429, 29300, and 1395001428