Challenging, however, in my opinion the 5 master is missing some clues to complete it without guessing or plain cheating, kudos to does who didnt.
Its freaking tidious to find out where one missing square might be.
It would be better with an undo for when one drag and colors or cross by mistake.
Other then that, well done.
Great concept, however, its the second time i try the suitcase task, and i get stucked, unable to move, only able to look. I tried with 2 different browsers to no avail. And having a save option would motivate me to attempt it again. Too bad would had love to complete it.
 "Prehistoric Shark"){kind=icon}
 "Picma Squared"){kind=icon}
 "Antimatiere"){kind=icon}
 "The Last Stand: Dead Zone"){kind=icon}