After 2 months, my dungeon is ready to be shared

The MASTER Key.
You can download the data file here : http://www.pandafox.fr/temp/masterkey.dat
or nexus : https://www.nexusmods.com/grimrock/mods/140
Story is not my cup of tea, I really don't care the story of a Dungeon master like. I only enjoy a dungeon if it is good to play.
Then my story is simple : You must find the MASTER key to escape the DUNGEON !

I enjoyed to build and test my dungeon, it was a great experience even if it tooks a lot of my free time.
My model was DUNGEON MASTER, my best game forever. I tried to make a dungeon in the same spirit...
I tested it a lot and a lot of times, and I am 99,9% sure there is no problem, it is playable but maybe only good players can finish it

To finish it, I need around 5 hours but I know all about it, then for a "normal" player I think... Maybe 7 or 8 hours... or more...
As I am the only one tester I can't say it is a very good dungeon even if I would like to

If someone enjoy to play it I should be happy !
Have fun !