.PHONY: www/js/escalator.js
www/js/escalator.js: $(shell find src -name "*.js")
mkdir -p www/js
cat \
src/open.js \
src/utils.js \
src/screen.js \
src/scene.js \
src/box.js \
src/platform.js \
src/menu.js \
src/game.js \
src/main.js \
src/close.js \
> www/js/escalator.js