Great but...

It’s a great game but:
1.- I can’t unlock any other park without paying. It’s impossible. I’ve completed every single challenge and nothing.
2.- Since I upgraded my Macbook Pro to Yosemite the app just crashes when trying to open it. It says “Touchgrind BMX quit unexpectedly”.
I hope this gets fixed because I really enjoy playing this game :).
EDIT:
The 2nd point of my last review is fixed. But I (and many more) have the same problem from my 1st point :(

Sandroooooooooooo about Touchgrind BMX