I really loved the game and finised it four time (first to finish, second failing to have less than 5 reset, thrird managing to have less than 5 reset, frouth for fun).
I'v noticed that in the level "line 'em up" there is a yellow lever and no yellow door. More, you need only half of the tools you have. Is it on purpose or did you forget to put the yellow door.
Oh, and I spend half an hour to finish the last level the first time whereas you only need trhee gold bags and one one-way door to finish it plus one bag and one door for the gem -_-.