hello to all, in my game I create a script with a one variable that i need to be changed mannualy when my game is running, beacause i used this variable like an adjust velocity, please look in to the attached image
Generally you just expose the value in the inspector and change it.
If you need the change to be permanent (eg, not revert after each run), ScriptableObjects are one approach.
This guy made a good talk about them:
