I love the motif of kind of spiky flowers like this on baked goods. It contrasts nicely with the soft roundness of the cake itself, don't you think? I don't know much about flowers but I bet you guys do; are there real life spiky flowers like that out in the wild?
So much cupcake decorating is based on the notion of piling heaps of stuff on top of the cake, it's refreshing to see someone make use of negative space here, so to speak. A creamy pool of frosting in the middle of the cake is a nice change!