As with all SU swaps, you are encouraged to use multi-layers and embellishments, at least one. I find some cards just don't call for them, but it certainly forces creativity, which is why I participate in swaps.
With this card, I feel that the button could be left off and the card still nice. But my snowman has a healthy diet, so his belly is round! I used glossy paper which gave it a nice clean effect, and of course bling!