You will start playing on the only planet, that floats among the empty space and your goal is to survive. Your first task is to grow roots on the planet and make use all of it's resources. When your life will become stable enough, try to reach out the floating island in your sight of view - you can find useful things there.
How to install:
Download and unzip archive
Then go to the any File manager
And copy the map in to the "/storage/emulated/0/games/com.mojang/minecraftWorlds" folder.