You have a wonderful idea here...perhaps you just need to decluter the composition a bit... I'm a bit confused by all the colors and things in the photo! Of course that could just be me... :) But the lighting is great - keep it up!
Ooh, neat concept! The composition looks a little busy... I like that it is very closeup - really emphasizes what is happening here - but maybe having a solid-colored plate would have minimized the complexity.