Thanks! Yeah it's deceptively difficult; depending on the word length you choose, it's one of the hardest games I've ever made. There are several tricks to it, though, it's not just random guessing; it's very sudoku-like.
It's Bull-Cow because that's the name of the two bits of information you get 😅 the bull is the bullseye, right letter on the right spot, and the cow is close but not a bullseye, right letter on the wrong spot.
The game and name are not my original design, this is a classic old logic game: Games › Free