You can download the latest version of Grayscale.
Take a look at the Grayscale hint file if you
get stuck.
If you would like to read my thoughts about the game and various reviews
that have been written by other people look here.
I've also made the source code for Grayscale
available for anyone who's interested in that sort of thing. If you want
the original source files for some reason just email me and I'll send
them to you.