Conway Cubes - Game of Life in 3-D (or n-D): Asked once in Advent of Code (2020) https://adventofcode.com/2020/day/17

that's a great demo and UI. if you like 3d cellular automata, here's a 3d cellular automata voxel shader: https://github.com/kchapelier/cellular-automata-voxel-shader

Very cool, especially if you zoom in and use the step-button repeatedly/