The DirectX and OpenGL have different working conditions, one needs a good CPU while other a good graphics processing unit respectively. So, I recommend you to change the engine and try relaunching the emulator, in most cases the issue is solved if it is due to engine incompatibility. Delete ...
Some of the games do not allow their users and gamers to use emulators to play games as the emulator users get better advantage of controls over mobile gaming users. So specially combat games prohibit the use of emulators. Whereas most of the other games allow users to play from anywhere ...