Minecraft wiki entry for PC_Gamer_Demo, associated text: Menu screen logo.
The demo's spawn point.
The chest and sign next to spawn.
The chest items.
The secret Gunpowder chest unveiled.
The giant "PC Gamer" logo, found across the lake from the starting area.
A map of the area around the spawn point in the demo world.
Chat message telling the player that they cannot interact with the world, but they can still interact with some items.