Its really rare that you find this kind of depth in a game really love the use of mirrors. Biggest thing is you need to rotate them. It is not an easy game but its not meant to be its all part of the puzzle.
Yeah, you are right. One of the things I've to improve is the tricky factor of the game, cause puzzles are easy to solve except for the last one, also I should add more mechanics and improve the map design hahaha, thanks for the feedback btw!