You misspelled "survival" in the description of the game. It currently says "This is a voxel style sandbox game that focuses on surviva. You can do anything inside and destroy any block. If you like playing Minecraft, this is a game you must not miss."

Are there caves or other random interesting things like villages or ruins?

This looks like an interesting project. However, after reading the description and watching the videos, beyond having different textures for the voxels, what does this do that Minecraft does not do? RPG games are usually almost 100% carbon copies of each other mechanically, but you'd buy more than one because they all have different stories and characters. They don't need to always reinvent the wheel, because they use different and unique (to varying degrees) stories. But, in an open world, sandbox game...