https://github.com/KoleckOLP/RPScore/blob/master/Assets/MainScript.cs

some tips:

1. If you want an editor exposed variable but slightly faster, use [SerializeField] private GameObject example;
2. Consider using public const string over public string if it's going to be used every time your game is active
3. (Preference) Use the new Input System over the old one, as it offers better performance by skipping Update loops
4. Avoid adding strings together like $"{stg}_5_win.mp4" as it generates memory garbage, instead import ZString and use ZString.Concat(stg, "_5_win.mp4")
5. (New C#) You can replace stg != 5 with stg is not 5, stg == 5 with stg is 5 and same with strings etc. Note that this only works with constant values, so no dynamic ones
6. Create a new System.Random instance as a global variable, rather than a method one. private readonly Random rand = new();
7. Avoid using boxing like (int) as it is often extremely expensive to do and can generate memory garbage

Might not be a problem with this app I seem to have issues with some unity apps.

The current build was rushed, and I didn't even wen't thought the player options, the window can't be even resized.

Add labels that say what she picked,
Maybe even buttons to reset lose count. (which don't really impact anything)

This will not be the same as the UMD on the PSP but will make the game more interesting/challenging.

Also, could be a toggle, with a number of how many loses trigger losing progress 1-3

ultra hardcore, 1 loss reset the whole game to beginning

Unity random seems to be better in every way, less performace impact
and hopefully better randomization