To be clear: Egbert's first contribution is now here in the git:
https://codeberg.org/tfw/lispmoo2/src/branch/main/games/egberts.limo
and Egbert's second contribution, connecting to Screwtape's MOUNTAIN-TRAIL is here:
https://codeberg.org/tfw/lispmoo2/src/branch/main/games/egberts-2.limo