This is a Julia set renderer. Not much else to say. The code was based off of the Wikipedia Pseudocode for the Julia Set.
The controls are (X) to zoom out, (Z)/(C) to zoom in, and the arrow keys to adjust the fractal parameters.
Hopefully you can enjoy it!
PS There are probably ways to increase the speed of this program. (This is my third published cartridge and so I'm not too great at pico-8 yet.) Once you zoom to fit the screen it takes ~2 seconds to respond. Feel free to point out changes that can be made.

fractal fractals juliaset