I just finished the game--very cleverly designed puzzles! I couldn't stop playing. I think your game has market potential. At times, I was reminded of how Zelda levels are designed: where the player can see areas they cannot yet access, which makes the player want to figure out how those areas can be later reached.
That box pushing puzzle on floor 21 was cleverly designed. At first, I thought it was something I was supposed to skip over and come back to later once I gained an extra ability. But after exhausting all options, I decided to go back and re-examine the puzzle, as well as how it connects to adjoining floors.