I figured out what I liked to do and setup a simple scene in Unity to help me think about it and get a better picture to take notes on. One of my first ideas when I thought of "unstable" was alchemy (probably because I have been playing Potion Craft recently). Unlike Potion Craft where it's fairly calm and everything revolves around interacting with the potion chart, my idea is to have a game where you have to create potions by balancing different aspects of the mixture and prevent it from becoming unstable.

First I'm going to just start of simple with only a few ingredients and potions that can be made. The only aspects I'm going to try to implement at first are concentration of the ingredients and temperature of the mixture because those are the easiest to wrap my head around.

From there I'd like to add other things like interactions between ingredients and other aspects like acidity or something.

If I'm able to make a complex enough potion maker in time, I'd like to expand the game so you have to balance other things like your customer base. (Thinking something like Reigns where if you piss off certain groups of people too much you die)