You can take MTR line 1 from the Window of the world to Huizhan ZHongxin, then tramsfer to line 4 to Huanggang port. There, you can take the direct bus to HK Disneyland. Tbus runs from 08:00 to 13:00 on an interval of about 15~60 minutes. It takes about 50 minutes and costs about CNY80.