Game stucks at NFS NL logo, cant go further

I've been playing the game for more than 6 months. Since last night, game began to stuck at black NFS NL logo, small orange circle keeps spinning on and on but it cant go further, game never opens. What is the problem? I tried different wireless networks and GSM networks but still never opens. My primer phone is Samsung S5 (running on Android 5.0) , I also installed the game on my other phone, but it ended up with the same result as well. I tought to install the game again on my S5 but then I,m afraid to lose my overall progress. What is the problem? What can I do? I have a huge park of advanced cars and career. Please help me.