Have you considered adding Bluetooth to it?
It takes the data from the mpu6050 in the program I have too, so why would you need a separate one?
Yes, it is a standalone vr headset. But to play games like that I would recommend using a faster processing unit. The raspberry pi zero wouldn't be able to run beatsaber from my perspective. It may be able to run art type programs, that is if a controller is connected to it. So if you are wanting to run high end games, I would recommend getting a designated virtual reality headset such as an oculus rift or htc vive.
(Sorry, just saw your comment) Cool! Could you possibly post some pictures of it? I was wanting to try the same thing.
Where is that error coming from?
You could try adjusting the Google cardboard viewer, mine didn't work the first few tries either. Hope you get it working!
I am not quite sure how I would do that, it is a good idea though.
DIY Raspberry Pi Smart Goog...View Instructable »
DIY Pro Trinket SmartwatchView Instructable »
Would it be okay if I used the code for this as a step tracker in a smart watch instructable I am making? I would give the original link and credit to you.
Great idea! Have you been able to print anything with it?
DIY Raspberry Pi VR GogglesView Instructable »