While most instructions are as accessible as possible, the Rubik's Cube breaks with this tradition. On each side of the cube is one required component. On the top is the finished assembly, and on the bottom is an exploded style diagram of how to put it all together. While the components might be easier to identify with text next to each telling you what they are, I liked it much better without. The exploded diagram could also be changed out to a wiring diagram for a different project, but for this, I feel everything works as is.
One idea behind this is to give it to a friend mixed up, and once solved, they know what they're building. You can heighten the puzzle solving experience by making the thing the Rubik's Cube tells them to build: a way to decrypt something else you've given them. For projects with more materials, you can either use multiple cubes, or a cube with more sides.