A remix that I originally intended to do a long time ago and only now got around to. :-P Basically, it's like the original, but instead of rendering a fixed set of Minecraft blocks, it lets you make your own block using image codes from my image editor: https://scratch.mit.edu/projects/18119879/ (Or, if you want to use this without having to draw something in that project, you can convert from PNG on my page at https://arctenik.github.io/zatnik-images/utils/ ) The project starts by showing the six faces of the block. You can click a face to select/deselect it (all of them are selected at the beginning). Clicking the "Add texture" button will let you enter an image code for a 16x16 image; once you do, that image will be applied to all the faces that are selected. (If you want to keep your image, make sure you also save the image code in a safe place!) Clicking "Render block" will show a block using the textures that you selected. Drag with the mouse to rotate the block.
A lot of the project is the same as the original by @CodeLegend, who credits, in short, "Minecraft (Mojang AB), Basic256, @DadofMrLog" for various parts I didn't worry a whole lot about any sort of optimization while making this so there's a fair bit of unused debris left over from the original project