Default Nexus 5.0 Previewn : Bug List and Quesitons

Hi , I want to make an theart about the Bugs and Question for the Nexus 5 Android 5.0 Preview .
First I have an Question :
-Why canīt I play Asphalt 8 , Gangstar 4 usw. ?
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Deviced : Nexus 5
Rom : Stock and CyanogenMod 11
Kernel : Stock/Francasio Kernel

Deviced : Samsung Galaxy S1
Rom: CyanogenMod 11
Kernel : CM

My Webseite :
http//:meineupdates.weebly.com

I am 13 years old and make apps