Decided to start playing the game "Don't Starve" with no clue what I'm doing. A strange guy pops up to greet me and then disappears on me at the start of the game.

When I gained controll of my mammal character, I headed toward the strange area with a stone that I was able to touch. I have no clue what I did, but hopefully something doesn't pop up to try to kill me for touching this stone.