Very disappointed

I downloaded this game today. I have had it for so little time that Apple hasnt sent me the receipt yet. Initially I was very happy with the game. The tutorial is actually helpful. The game is challenging. And just after the end of the tutorial, the game started crashing. It wont let me go on, it wont let me go back. If I shut down the game and reopen it, I can play one board and then Im back to the same problem. I was looking forward to a new game. This wont be it.

DiGru about Trainyard Express, v1.66