[ThomasWink1981]

I'm going to have to print this one out lol. Very creative.

[lcnPylGDnU4H9OF]

I remember playing this in a browser. I'll try to find where.

edit: https://jimbly.github.io/regex-crossword/

[tills13]

oops there went my afternoon

[abbeyj]

I built a browser-based version that allows you to rotate it: http://www.stardrifter.org/regexp/

[dunham]

I've done this a few times over the years (and occasionally printed another copy when I made a mistake). Lots of fun. I wish there were more like it.