A reorganization of https://github.com/aochagavia/rocket a demo rust game, using the Elm architecture http://guide.elm-lang.org/architecture/index.html.
For fun.
On my system homebrew links to /opt/boxen/homebrew/lib
So, export LIBRARY_PATH="$LIBRARY_PATH:/opt/boxen/homebrew/lib" or export LIBRARY_PATH="$LIBRARY_PATH/opt/boxen/homebrew/lib" in order to link to SDL2.