@Al_ex : I just test Grand Prix 2 (yes, I choose the extreme) : on my S7 edge, the game was playable in vga with almost all graphics options ON, or in SVGA with almost none graphics options ON.
Now the game is only playable in vga with all graphics options OFF (svga slow down to death when more than two or three cars on screen). So yes performance impact is noticeable, and I guess the more the game is big and your phone is weak, more the impact is noticeable. But Pixel trap is just awesome and I didn’t plan to play GP2, so… don’t care 😀