Existing 3D App needs upgrade / changes

I have a Health-Mindfulness app that needs some upgrades and improvements (Unity). It is a 3D app. We need an experienced developer / coder to get to grips with the code and unity set up.

First stage: -

1. Reduce the size of the app. Enable code shrinking (also known as minification) to remove unused code and resources from your release build. Enable obfuscation to shrink class, method, and field names to reduce app size and help prevent reverse engineering of your app.
- https://developer.android.com/studio/build/shrink-code

1a. Improve 3D optimisation. Look into Object Pooling for example. Please look into the possibility of eliminating the assets which are behind the user and infront of the user. The user for example, can not look fully backwards, only sideways. This means 30% of behind can be eliminated as player moves forward for example.

1b. Explore good looking fogging effect for the front so that 3D assets do not need to spawn too early and use GPU.

2. Reduce the camera movement sensitivity. Reduce the perspective movement per swipe. Right now the camera moves too much with swipe. Reduce.

5. Add the option for ALL PHONE default Back buttons to be implemented = Pressing Back goes back one screen / one option.

6. Remove statues at the end and create a fade / reloop effect.

I need all these before end of month. So that would mean 20th July then we refine.

https://play.google.com/store/apps/details?id=com.LiminalSenses.CountTheSheepASMRRelax&gl=GB

Any questions please ask. Thanks