How can I improve these with edible markers?

I’m making these for a friend’s event and I want to make them look “nicer” or maybe fancier with edible markers. Do you all have any suggestions or recommendations? I was thinking of maybe adding small details to add a “sheen” effect and maybe ice cubes in the peachier cookie? I have white, black, orange, yellow, pink, and green markers. Thank you in advance!