Hello there. After your reports and investigation, problem is finelly fixed. Light will be able to move normal again after restarting a game during night! Bye!

1) I accidentally pressed a key as it slid off my lap. I reset the puzzle. I have been unable to figure out what I pressed and now I have a locked up puzzle because Yellow got locked too soon. 2) Is there a way to actually save the game? I see the way to F1 and exit without save, but F4 does nothing that I can see happening. 20 levels done, and gone thanks to the lock up and an F1 key....

- BUG: For most puzzlies, if you leave the game with ESCAPE / F4, it does not save the last puzzle you have solved. So every time you load the game, you have to redo the last puzzle. Please change it to save the exact state of the puzzle the player is cur...