Reminds Me of Frantic Factory from DK64...
The loop is very good indeed.
However, I recommend making the diversified sounds a little bit louder. I realize that it's supposed to be sneaky, and that's why I approve of them being quiet for the most part, but that's just a tiny bit too quiet.
Here's an example of how loud I think it should be;
As you can see in the example, the diversified sounds are a bit louder than the repetitive one (the snapping).
That being said, the loudness is only a very, very minor problem. It's still very, very, very good.
Also, keep in mind that I've never made any audio stuff (though I'd like to), so this isn't a professional opinion.