Create a Minecraft-style game using the Ursina engine. The core feature is generating terrain with Perlin noise, but without relying on external libraries for noise generation. The project should include:

• Implementation of Perlin noise algorithm from scratch in Python.
• Minecraft world generation mechanics: chunk-based terrain, block types (grass, dirt, stone, etc.), and biomes if possible.
• Efficient chunk loading/unloading as the player moves.
• Basic player movement and block interaction (place, break blocks).

The goal is to mimic Minecraft's world generation and mechanics as closely as possible within Ursina, focusing on procedural terrain and the technical challenge of Perlin noise without libraries.