Quote from Lucable
If you have no mods, Force Update the game. If you have mods. force update the game. Optifine depending on the version and the setting will change your textures so check up on your settings. If it still doesn't work you have a problem with your source files with MC.
Secondly it's impossible to explore all the caves/area and complete the game. If you still think you did. Learn how to use redstone.
Yea I probly have a bad computer. I'll just force update it and see.
What I meant by "Explored all caves", is the caves in the area. I can't find any more caves.