I spawned on a snow level (early alpha) walked around my spawn, discovered I can punch dirt and stone, made a fifty block long tunnel at water (ice) level by which time it was night, kept walking around on the ice, exploded, re-spawned, found my tunnel, went back, found the crater, got confused as to why I had exploded, found a zombie stuck in some water trap thing, got killed by it when I went in the hole as well, re-spawned, went back, looked on internet for instructions, discovered I could right-click to place blocks, made a dirt platform house, looked up more instructions, quit, started a new world and started playing again now I knew how to do stuff.