Game ruined when updated to unity 3.2

I had been working on a game for quite some time on Unity 3.1. When i updated to Unity 3.2, it offered to update my game so it would work with Unity 3.2. I accepted, but when i opened the game to edit it everything was screwed. For one the trees didnt display properly, they were just a jumbled mess of textures. Two,i am unable to test my game. I press the "play" button and the game screen appears (with everything messed up) for about a second and disappears again. There are probably other problems i am yet to discover aswell. If anyone knows how to fix this or even re-update the game, any help would be much appreciated.