About This Game
Creative? Survival? What's with all the blocks?
First, the tall green things like to be stroked. Try that later for a nice surprise.
Minecraft is split into two separate game modes. Creative and Survival. You can play both of them in multiplayer. If you're mostly interested in making huge structures from scratch with unlimited resources, Creative mode is your best bet. You won't see any enemies, and you can pull blocks of all shapes and sizes out of thin air. It's a peaceful world.
However, if you'd prefer to adventure into a world of danger, where you're crafting and creating out of necessity, you'll probably want to play in Survival mode. That comes with gangs of monsters who want to break/explode/eat your bones, one pixel at a time. You'll need to protect yourself from the creatures that come out at night.