This is a very good idea for the challenge, but you picked a tough one to execute well. It's hard to get a good shot by candlelight! From the comments you received, I think viewers liked your subject choice for the challenge, but the lighting and the composition may have hurt you.
What you may want to try is using some additional light to highlight your subjects - don't rely on candlelight alone. You'll still get the effect you're after if you keep the additional light diffuse and soft, and you'll get a clearer image of your subject. By adding some additional light, you can reduce the size of your candle so it doesn't overwhelm your subject in size, too.
Hope you find this helpful! Feel free to PM me if you have any questions, and keep shooting!
It's not entirely clear to me what the subject of the shot is supposed to be. The lamp is obviously the brightest thing and large and in the foreground, but the bears are on a heart so I keep thinking they were supposed to be the focal point. Unless there is a relationship between the bears and the lamp ... dunno'. This one is befuddling me.