Your eyes can only see shadows but your tribe's existence depends on you to save them from what can't be seen. Try to look beyond the shadow on the wall and finish the rituals by rearranging the tiles to the patterns drawn by your ancestors.
One hand tied behind my back
put the files on a local web server (e.g. mongoose, xampp) or file sharing server (e.g. dropbox) then open index.html through the server in any browser with WebGL support (e.g. Chrome).