Code Cruncher is a Mastermind type of game. New puzzles gradually get tougher (longer codes). The game use letters A through F, and requires you to enter letters, not colours. Unlike the Giotto game however you are not required to use existing words.
The About box might still say something about a licensed version, you'd better ignore this stuff, I do not intend to make a more subtle version.
The current version is 0.1. It is intended for Windows 95 or later.
Download it now.
Don't sue me if anything goes wrong, you get it for free, and I garantee nothing.