Lotsa skittles in this challenge. Who'da thunk it? Focus and lighting are pretty good. Maybe the composition would be better if it weren't so centered and straight up and down.
Nice and bright, and the sweets stand out well against the black background, but the composition as a whole is undynamic, and doesn't draw me in. You have chosen an ultra shallow depth of field - I would have preferred if the only sweet in focus wasn't dead centre in the frame, but at the third line, eith er top or bottom.
An interesting approach to the rainbow challenge - I would have liked to see a more direct color metaphor for a rainbow instead of the repeating orange, yellow, red, and greens.