From Mark Ingebretson:
Released the game and its source code in 1999 under the GNU General Public License. Now that I've got a color Palm 505, I wanted to see Vexed in color. I've taken source and added some 256-color bitmaps to allow the program to run on both monochrome and color devices. Also, Steve Haynal has provided an additional 60 levels, also released under the GNU General Public License.