: You can download the latest official Bedrock Beta/Preview versions via the Google Play Store to test upcoming features like the Pale Garden.
Minecraft Alpha 1.0.16_02 was originally a PC/Java Edition update. There is no official "APK" from Mojang for this version. The APKs referenced are fan-made launchers, emulators (like PojavLauncher), or modified backups for educational/archival purposes. You should own a legitimate copy of Minecraft to play these legacy versions.
Why do players love this? Because it is brutally hard and lonely. The fog is thick, the world feels infinite and empty, and every zombie sounds like a dying robot from the 1980s.