Good shot concept and great color. That little touch of yellow in all that green works as a great attention grabber. Very well exposed catching the splash in stop motion. A good feeling of depth. But if I were a judge looking at this picture I would fault it for the wrong format. The dominant lines of the composition are vertical and you have a scenic or horizontal format. I also would fault it for, as stated above, cutting off the splash and also cutting off the bottom of the glass. It's kind of like taking a picture of a person and cutting off the top of their head and the feet at the ankles. As it stands the glass is a major object in the composition and all of it needs to be included. Or, another option, you could cut the glass off just below the lemon and concentrate the shot from the lemon up to the top of the glass and the splash. I think that would make the glass secondary to the main subject, the lemon dropping into the liquid, and the splash coming up from it. I would still shoot it in a vertical format. To me the background green is a little too bright and a little distracting from the main subject.