Guess the Word
the keys remember, so you do not have to.
the five-letter word game, typed on a gold typewriter: the keyboard remembers what each letter has earned
The five-letter word game on its real rule: green in place, ochre somewhere else, grey when the word has none left. The keys keep what each letter has earned, so you deduce instead of remembering.
Concepts: constraints, deduction, information.
An interactive you play with one thumb, on Wundr.