This datapack makes it so that you can beat Minecraft without ever going to the Overworld, Nether Portals stop working and you have to gather resources and make it to the Nether Roof and build an End Portal. This datapack spawns you at 0, 32, 0 on a 3x3 platform of bedrock and gives you 64 netherrack and a wooden pickaxe. It is only compatible with 1.16.2 and above.

Changes:
Loot Tables:
Wither Skeletons have a 5% chance to drop redstone
Piglin Brutes now always drop 9-16 endstone
Piglins have a chance to barter slimeballs
End City chests now contain fireworks of every flight duration
Nether Fortresses have an increased chance of finding diamonds

Advancements:
The Adventure and Husbandry tabs are removed, and so is every advancement that is impossible
Some advancements are altered so they are possible, especially criteria advancements now requiring to kill less mobs, eat less types of food, etc.

Recipes:
All recipes that require cobblestone is replaced with blackstone
All recipes that require planks is replaced with either warped or crimson planks
Glass can now be smelted with soul soil
NBT Floor Crafting for End Portal Frames and Eyes of Ender, but be careful, they only work on the Bedrock roof -
24 diamonds, 36 endstone and 36 obsidian for 24 frames, and 12 ender pearls with 12 blaze powder makes 13 eyes of ender.

To Be Added:
Removing the unobtainable recipes from the recipe book
Anymore to be suggested would be appreciated!