JonBMN, it's good idea you to help me, but I don't know when exacly I'll begin programming the game stuff. For now, i'm collecting ideas from users and making a list. I'll place it here and everyone will be able to write his/her own idea.
I'm planning the first version of the game to be like "Minecraft classic" and then develop it.
P.S: Do you have any knowlegde about voxel generation alghorytms, becouse i can only generate a simple hill landscape.