Hello, Redux_Soul!
This tool compiles the source code to binary that nwjs understands and packs the files into an archive (or packages), if you wish. While the tool itself brings pretty good protection, dedicated folks that know how to disassemble games will figure out how to break it open. There is not silver bullet that can make games crack proof. Still, if you want to protect it as best as possible, you can;t go wrong with it.