Gonna try spriting

[NICKtendo DS]

Well, the chopsticks are jagged and are basically lines outlined (the outline dominates the color inside). Try giving them more shape and make the pattern of the lines consistant (1-1-1-..., 2-2-2-..., etc.).
Also, you shouldn't worry about contrast too much when it comes to color (you mentioned the noodles and the chopsticks). In a limited palette, some objects have to share colors. As the sprite looks now, the chopsticks and noodles are easy to recognise, regardless of color.