This version is often described as a "lost" or "abandoned" version of Minecraft that shouldn't exist. Common features reported in this horror mod include:
Minecraft Alpha 0.0.0 was a rudimentary version of the game we know today. Key features included:
Here is everything you need to know about the origins of this version, the creepy legends surrounding it, and how you can actually play the earliest versions of Minecraft today. The Truth About Minecraft "Alpha 0.0.0"
You can find versions dating back to 2010, including early Alpha and Infdev builds. The Risks of Third-Party Downloads
This version of Minecraft is extremely basic and lacks many features that are present in modern versions of the game. You might find it interesting for historical purposes or to see how far the game has come, but it's not recommended for playing as a primary experience.