I had thought about mouse input, but wasn't sure how pushing would work.
As I mentioned in another comment, level 7 was the only puzzle where the art/layout was determined before the puzzle since I wanted it to look like a real room my friends and family would recognize. The result was a bit of an awkward puzzle, but it was worth it for their reactions. 😅
Anyway, glad you enjoyed the game! Thank you for the kind word.