I read all the reviews on this game in windows store and understood the problems that all are facing and therefore I'll share my way to deal with it.Majority of the people are facing the problem of constant download errors that pop up continually viz."check your internet connection",I faced the same problem and thought to uninstall and leave the app but then I wondered if its an server issue or not.I constantly resumed the download by tapping "yes" and after half an hour it showed from 0% to 1%.I know its an awful and tedious job but after it crosses 50% the rate of error pop-ups seems to be low.Please note that if the download is stuck(ie.there is no transmission of data) do switch off and on your WiFi and then tap "yes" to resume download.Also if you take a look at the LED of your WiFi that indicates transmission,you'll notice the download resumes even after download error pops up.I only suggest you all to have IMMENSE patience.
P.S.The game is running flawlessly.