It is #EnigMarch, and each day the excellent EnigMarch people post a prompt word; then puzzle nerds try to design puzzles around that word. (Today's word is rock.)
So I made one of those fancypants drill-ladder web page things. I didn't try to embed the puzzle in this here blog post page because I didn't want to think about whether the puzzle styles and the blog-post styles would fight. Anyhow, go check out the drill-ladder web page thing.