I'll keep this short and to the point. I'm a little confused that this picture is in this challenge.
Composition - The subject is not grabbing me right away. The sign is a major distraction as it is easily the brightest thing on the page. The challenge is painting with light, which to me would indicate a shutter speed much much slower than 1/30 sec. The light seems to be diffuse and I don't see what exactly was painted with light.
Technical - This picture isn't terribly clear. It isn't lit very well, and it looks grainy probably from the ISO 320. I don't think the technique of the challenge was used at all and if it was, I can't see how.
Overall - Looks to me like your photo was entered in the wrong challenge or you clearly did not understand what the challenge was on this one. I know this sounds like a harsh critique, but quite frankly, I'm a little lost on this one. Sorry this is not helpful at all. I'm not sure what the right thing to say IS. How about Best of luck in future challenges. - Bob
IMHO, using a flash could be considered "painting with light" but in this case it's simply an on camera flash...which doesn't really constitute anything particularly inventive or interesting.
That being said, this shot is entirely too underexposed, the skier barely stands out against the black sky.
Not only does this not meet the challenge, the image is poorly done. I'm sorry but I have to give this shot a 1 for meeting the challenge, a 1 for artistic merit and a 1 for technique.