Click on the screen to add a vertex. A mesh should develop as you add points. If you add your points along the features of the reference image you will get a nice result. Once you have added enough points press SPACE. Your poly art image will appear. Press SPACE again to toggle back and fourth between the mode where you can add points to the mesh and the mode that shows the resulting poly art image.
The 'how' of this project was mostly developed by @gtoal and @Zro716 here: https://scratch.mit.edu/discuss/topic/140162/?page=33#post-2025302 If you want to use another pic you can use this project (. https://scratch.mit.edu/projects/66980580/ ) to scan a pic into a list. Use a resolution of 60x45. Export the list from that project and then import it into the "image" list over here. http://stackoverflow.com/questions/563198/how-do-you-detect-where-two-line-segments-intersect
