Nice shot - good framing and composition. The clean, neutral background helps a lot. The actual positioning of the hammer feels a little off (it's not hitting the clock squarely) but that's a minor complaint. It drives home the feeling of snooze alarms.
I really like this picture- one of my favorites for this challenge. I like the thoughtful approach to the topic and the execution is top-notch. The lighting and exposure looks very good and the focus is crisp. I think I would have preferred to see this in color (with a different hammer if this is one of those with a bright yellow handle) and a non-white background.
I'm not sure if it is the case, but it looks a little set up to me. The glass behind the clock is a deads give away. It's a very good idea and a good attempt, but you probably could have done without the glass behind the clock. I still give you a 7.