Sorry to point you to another Asset Store thingy… but I stumbled on something cool:
https://itunes.apple.com/us/app/rocket-plume/id1146955067?mt=8
The above is made with this:
Which is available for $14 USD: PixelSurface | Particles/Effects | Unity Asset Store
But what’s even more interesting (and potentially cool), this guy made a scripting language on top of Unity:
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