KulaWorkshop/PakTool ? reverse-engineered prompt

Build me a simple desktop tool for Kula World PAK files.

I want one part that can take a .PAK file and extract all of the levels into a folder so I can view and edit them easily, and another part that can take a set of level files and pack them back into a new OUTPUT.PAK file. Make it easy to use, so I can either drag and drop a PAK file to extract it or open a file picker to choose the levels to pack. When creating a PAK, the order of the files should matter, so let me pick them in the exact order I want the game to load them.

It should work for Kula World, Roll Away, Kula Quest, and the demo files if possible. If you need to check anything about the PAK structure, look up the current docs online.