The turtle

Dear author, in my opinion this is a very cool idea! I really like the essence of the level idea. I immediately understood the meaning and clue on the roof. But, in my opinion, the degree of difficulty is very high. I think that I have good spatial thinking, but it is still very difficult to imagine in my head the interaction of all these figures (even if you understand their shape). There are a lot of elements. I gave up.
I decided to remove the roof in mekostudio and see the correct combination. I was surprised because even disassembled it took me a while to find a solution. Therefore, only a genius can solve this in closed form!

Idea - Super! The degree of difficulty is only for a genius. In my opinion, this idea can be used to make a more accessible level with a small number of elements. Think about it. Because it’s unlikely that anyone will be able to pass this level. Thank you

I did the same and will say the same as @Denis Nazin.
With one difference. According to me, no one can understand the inside of the closed box. Not even a genius !
But someone who would like to try every solution might succeed in a few years time

Nice idea though, to be unbettered.