in reply to Stone Jam -- 21 challenging puzzles with perl Tk

Nice!

Some comments ...

You might enjoy Nintendo DS Braintrainer and Mastermind I once wrote

update:I notice that mastermind is currently broken. Need to check why
update2:
 
Found fixed and uploaded again
< is less colors, > is more colors, [ is less squares, ] is more squares

Enjoy, Have FUN! H.Merijn