The music was a little short, but really good, and I liked the puzzles. The only thing that I think was missing is a sound effect for when you rewind the clock, but other than that it was great!
I'm glad you enjoyed it! More sound effects is definitely something I would want to add if I were to polish the game some more - like you say, rewinding the clock, gears spinning, conveyor noises, etc. I'm happy with the music and levels too, although I wish I'd put levels 8 and 9 earlier LOL!