This project is not yet done. I still have to fix water falling to the sky (or void) and I'm going to make the nether upside down aswell.
But that is for future. You can still do many things. Here are some of the objectives:

Create an upside down house
Find a dungeon
Get full diamond armour and tools
Create a nether portal

If there are any more problems, say so in the comments and I will try to fix them, thanks.
Sorry to anyone who has already made a project like this.