Great idea but features disappear

Trying to enter the promo code, but theres no place to enter it. Tried to pay for concessions, but it wouldnt register the app. Tried to see my points history, but that feature disappeared as well. Its a good idea, and was fun to use at first, but there are a lot of bugs that need to be worked out to function properly.

Scotia354 about MLB Ballpark, v5.0.1