I liked this puzzle too and I also made a web based version: http://stardrifter.org/regexp/ http://stardrifter.org/regexp/ . Yours looks nicer but I do miss on

I liked this puzzle too and I also made a web based version: http://stardrifter.org/regexp/ http://stardrifter.org/regexp/ . Yours looks nicer but I do miss one feature from my version which is the ability to click a clue to rotate it into view.