Ok, I get it, I failed at information part - the last level was actually made so that not everyone will play it or end it, its is just there to have the concept fully executed. I think this should be properly notified to the player. And I believe I should have an easy mode with better maps/clues. I think for now I will attach a map with more clues to the game's description, maybe it will help some people who want to complete it. Thanks again