|Greetings from the Critique Club!
Made me smile, an easy 7 in voting. The shredded cards on a cutting board are a great idea and the knife, although sheathed, adds some menace to the scene. I might have tried to jumble the cards a little more, like mixed a few of the faces together, especially as they're all of the same suit, just to add to the chaos here. Throw off the viewer a little and make them go 'Waitaminute...' and come back to look at it some more.
But the knife being at the top also makes it a bit top-heavy, I think if it had been at the bottom you could have pulled a lot more off. Your light source is quite strong and fairly low, I'm guessing at an overhead flood, and that gave you those grievously strong shadows under the knife and to some extent, under the cards too. Remember that it's an Advanced challenge and never be afraid to dodge out shadows, as I don't think a reflector or diffuser would have helped much here.
But still, I love the idea here and use of handy-dandy tools around the house! And never fear, there is nothing wrong with entering a shot you like. Look at DPC as a gym, where people come to work out, and focus on developing muscles according to their own goals as opposed to the artificial ideals imposed by others. You're doing fine, just keep at it.
Feel free to PM me,