Okay, so this is my first texture pack, but it's simple so it shouldn't be that bad.
I can't give you any spoilers, but this doesn't change much, and I kinda messed up the Enderman's eyes, but here is one thing:
Try to go to the Void for a surprise.
NOTE: You may rarely come across out of place white pixels. This is because I used paint to edit the terrain file and I had to use paint.net to turn the white back into transparent, and it's hard to see the pixels that are still slightly unfinished.