On Android, select Vulkan for modern chips or OpenGL ES for older chipsets. On PC, Vulkan yields the lowest latency.
Which or apps are you trying to play?
This is the crucial part. EKA2L1 does come with any firmware files; you must provide your own device dumps or firmware files. The S60v3 version is widely considered the most compatible, with the Nokia 5320 being the most maintained and recommended device for this purpose. eka2l1 rom s60v3 updated