Backpacked: Shells

• An add-on for Backpacked by MrCrayfish
• Adds 2 cool new shell backpacks! The Snail Shell and the Nautilus Shell!
• To unlock the Snail Shell backpack, you must walk 5000 blocks
• To unlock the Nautilus Shell backpack, you must swim 5000 blocks

If you find any issues, let me know on Discord!