So they released a better version now that requires your login info.
Has a sandbox mode. And let me say this... I have a new found hatred... FOR THE FUCKING ROAMING NPCS. GOD DAMNIT, I HAD JUST FOUND THE PERFECT PLACE AFTER RUNNING AROUND FOR FUCKING EVER, JUST GOT OVER MY COLD, HAD FOOD AND EVERYTHING, START BREAKING DOWN MY NOT NEEDED DOORS FOR PLANKS, BREAK IT DOWN, BAM NPC RUNS THROUGH THE DOOR AND BRAINS ME WITH A HAMMER. GOD FUCKING DAMNIT.