FOSS gamedev and creative worlds

Whenever I create a new world, it works great for awhile and then it just goes black. The menus still come up, my inventory and health are still at the bottom but I can't see anything.

You're probably stuck inside a block. You can type



and press H and K to enable noclip and free move.

Then just press space until you're on top of the ground again and press K to disable free move.