So, you just would like to do traveling in HK or to shop at the same time. Anyway, you could spend one day to the Ocean Park, and then go to the Victoria Peak by tram to see the night view of HK. Actually, this city doesn't have too many top-class attractions. During the left time, you could visit Tsim Sha Tsui, Mangkok, Yau Ma Tei or Causeway bay to explore the local life and do shopping. On the other hand, you could plan a one-day's trip to Macau, too!