I have sent you the log file.
It says "WARNING: Shader Unsupported: " and "ERROR: Shader Shader is not supported on this GPU"
So it is actually about pixel/vertex shader versions.
Thanks! Yeah... It must be GPU related, unfortunately. I had no idea. I will try to get a clarification from Unity. Sorry :(
No need to be sorry man. I am a programmer as well and I know how this sort of small things pop up from time to time. Your game looks, plays and sounds awesome, I wish you the best of luck with the development, cheers!