You don't need to copy nwjs to every single game, you only need one instance of it on your computer and just run the program with an explicit relative path.
for example.alias nwjs="$HOME/.local/bin/nwjs/nw ."
This adds up when you have hundreds of rpgm games. Can also get rid of all the windows/nw related libraries and binaries to save space
find . -type f -iregex '.*\.\(exe\|dll\|pak\|bin\|info\|dat\)' -delete