if you don't mind me asking what did you use to change the struggle timer?
Unity games usually ship out with all the game code in Mono/DotNet (unless you switch it to compiled, which can have issues). I usually edit the game code directly with dnSpy for small mods like that, though that's a bit rough for distributing mods. For distributing stuff it's usually better to make something cleaner using one of the Unity modding frameworks, like BepInEx.