I'm sorry you're right,I didn't give any information, I'm sorry about that. Thanks a lot for your feedbacks.
The purpose of the puzzle, is you lost a member each time you interact with something (The legs and/or the arms) and you need to have at least one member to move. But you can recover your members on the lever.
The first time the lever was forward like you said, but with the playtests, my player doesn't know what is does. So I change it to face the door that open.
You can do that, it's just in the video it's me who played, and I know how to solve the puzzle, so I don't show it, it's my mistake.
The playtest gives on average 10 to 15 minutes with the “walk around the level, look for things to click on that you haven't clicked on” strategy. It was in my personal goals to have this time for the player.
It supposed to be a riddle, because we are in a mysterious abbey with an unresolved enigma. But I like your idea of human flesh.
No, the player can't die. It's game over when the player don't have any legs or arms on his body. The invisible door is used to automatically lose a leg to the ground. Each time he crosses it in the forward direction but not in the return direction.
Here is the speech for the level : You are sent by the celestial king to solve the enigma of the Abbey of Notre Dame Du Lys. Hidden deep within the Peak of Hope. What does this ancient monastery contain?