Compoundle is a word game similar to Jotto, Wordle and the various derivatives that have been going around recently.  This variation changes the clues to show you which letters in your guess are adjacent in the secret word (but not where they appear within the word).  Size of the words can be varied (I think this variation plays best when words are not fixed to a particular length) and the dictionary can be configured to choose more common or more rare words.
See the in-game help for more details.
Dictionary is based on the Spell Checking Oriented Word Lists (SCOWL) by Kevin Atkinson which is in turn based on several public domain and permissively-licensed word lists. Restriction to common words uses the Wiktionary frequency lists available under the Creative Commons Attribution-ShareAlike License. See the README files in the download for complete details, and Words.zig for the full word list.