Hello, I loved your demo and changed to be a package please check it:
Parallax Gyro

There is a few change as parameters like:
elevation that changes the back image size to be smaller.
intensity multiplies gyro value to translate.

If you want I can pass the repository to you to publicate at pub.dev or if you don't mind I can make the package available referencing you and this repository.

Thanks for this awesome demo!

======== Exception caught by services library ======================================================
The following PlatformException was thrown while activating platform stream on channel dev.fluttercommunity.plus/sensors/gyroscope:
PlatformException(error, (...) must not be null, null, null)

When the exception was thrown, this was the stack:
#0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:607:7)
#1 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:167:18)

#2 EventChannel.receiveBroadcastStream. (package:flutter/src/services/platform_channel.dart:506:9)

I/gralloc4( 4548): register: id=1e200000066
E/OpenGLRenderer( 4548): reset ##### pid = 4571

Hey! ✌️ Thanks for a really cool thing :D

I thought it would be great to include the showcase video to the readme file.