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another question: in submachine 10 what can i do with the spoon and the four stone cubes ?

Go to the Portal and click  1 0 0.
At the bottom of the tower, go right 3 screens and into Storage Unit 33/2. Assuming you have all 4 Loop Stabilisers in order to enter Level X, scroll through the rooms until you find a gray 5x5 grid, which has the corner squares.....missing.
OK Osmking, that should be enough info for you to meet your goal. If not, I also teach Remedial Classes (haha) in solving the countless puzzles in the SubVerse, if you ever need any help in the future. I enjoy helping others who are stumped, so don't hesitate to contact me.
SDRanger (Profile also found on Submachine Wiki)

(Edited 1 time)

Set the Spoon on top of the padded pedestal in the
bottom right - most room in H E L L L L

(You'll get nifty surprise reward!)

Osmking,
   Another quick note regarding the puzzle-question you asked Mateusz directly, here, (and I don't mean for this to sound condescending, so please don't take it that way...I am just giving you a tip, from a little bit of my own personal experience over the past 10+ years, and from years of my constant observations.)  I can guarantee you, and bet money that I will never have, that Mateusz won't be answering any questions with the nature of: "Where do I find all 5 of the Vector Finders in Sub 10: The Exit?"  Once you get to "know" the guy, meaning, once you become more aware of the colossal amount of projects that he manages to constantly pull off simultaneously....(and 99.5% flawlessly, to boot!) you'll understand better that he simply doesn't have the spare time to help everyone who gets stuck on a puzzle. (There are countless thousands of us who do at times, too!)
   Further, when he hasn't answered questions of this nature for you in the past, don't take it personally! He's not being rude. He is seriously one of the coolest, most down-to-Earth artist/writer/gaming developers that you'll ever know, and he still takes the time to listen to his countless followers, our suggestions for his future projects (when he asks us, a few times a year.)  And he still understands that most people can't afford $39.95 for one freaking video game! He hasn't "let any of it go to his head", even after his constantly increasing popularity, his many awards, etc.
Like I said in my other reply though...I'm here to help whenever you get stumped. I have plenty of free time, as I am nowhere near as talented as Mateusz. haha
SDRanger
(see profile)