I want to present you yet another One Block style map but with some upgrades. The basics are the same, you start on one block, and by destroying it constantly, you will be getting random blocks to be used for your needs. Be smart with how you manage resources, for they are scarce. The twist is after 750 collected blocks - Nether portal appears, and after 1500 blocks appears portal to the End.
How to install maps:
Download the .mcworld file below
Open file using any file manager to import it into Minecraft PE
Open Minecraft Pocket Edition and look for the map among your worlds