Thanks Wintermute and DarthJabba for your answers.

I flashed again and I saw old build.prop. For the moment, I solved my issue using Titanium backup from my mk808. The game runs now on my cube. I'll try others build.prop if i have same problem with other apps in the future.

Okay I started with flashing this rom http://www.arctablet.com/blog/forum/cube-u30gt2/rom-cube-u30gt2-android-4-2-2-custom-root-firmware-version-2-06-final-20131029/

 wifi went to hell with sleep mode and sometimes dropped out altogether i know it wasn't my router because i'm in the same room with it and my phone doesn't have any issues and it's a gingerbread OS. Battery life wasn't good either, my forever dying cube, i still tried to use it for a few months as i bought this tablet end of last year but have been busy with other things. After a while i couldn't care less about my apps and tablet but decide to upgrade after a factory reset and i use http://www.arctablet.com/users/forum/kasty_422_206_20131029_krnl38_OC_darthjabba_201310302104.zip but just before this after the factory reset i install avg do a scan all good except tablet is rooted so nothing unusual, okay now when i updated with cwm everything works alot better (wifi great and battery usage great maybe due to norton 360 helping out with the standby) but after i do all the xposed framework install and make sure there are no exploits with master key multi-fix and gravity box and advanced power are up to date i do a scan with avg, everything good but detects the settings app as malware and asks if i want to uninstall, i choose to ignore this and uninstall avg and check with norton 360 which doesn't detect anything apart from something to do with fraudulent calls (I'm guessing this is nova desktop - it mentioned something about being able to make calls but anyway i installed the hotfix or whatever norton wanted to do which it said it would monitor it) so before i installed the OC krnl38 from DJ AVG was all good then after this krnl38 OC got some strange malware reading from avg is it seriously problem or is avg trippin balls, because norton doesn't have an issue with it and it uses newer technology like cloud database??? this is better or what???

And for those who were having trouble with the lock screen not rotating u can change the setting within gravity box.

Overall great Job DJ but should i be concerned about the settings being malware infected?

I might install this http://www.arctablet.com/users/forum/kasty_422_206_20131029_darthjabba_cpu1800_gpu768_201401180918.zip

sometime soon but would like some clarification on the settings malware detection avg gave.

Yes they would, but somehow I think it may be a false positive, could just be the way the settings app is customized, and not something that is a concern for general security.

narrowed it down to the master key multi-fix it happens after you install this had to do a factory reset again to find out but yeah all good.

Also in future how do I go about getting the rockchip tool to recognize my device it won't turn green just stays pink. I'll probably want to upgrade to a Kit Kat rom in future, I can only boot to CWM recovery at the moment and yeah I'm not sure that rockchip tool is recognizing without bootloader, a bit stumped on this.

If I can't find a way I'll be happy enough to stay on this version, I get about 880 higher score in antutu on krnl38 seems to run my tablet better.