Alpha versions featured "Old" worlds—tiny, finite maps surrounded by an invisible barrier. There were no caves, no ravines, and no strongholds. The world was a flat-ish field of grass with trees and a few surface lava pools.
On the horizon, a massive shape loomed. It looked like a house, but generated by a broken algorithm. The walls were made of bedrock; the windows were crafted from gold ore. The door was a painting. minecraft alpha 00 0 apk free