I started playing Swapdoodle a lot after friending a few people on my 3DS, so I made a version similar to it on Scratch for people without a 3DS :D You just need the mouse, or the project is also compatible on mobile due to the small size. However, you need to press see inside to save/load lists, so maybe not. Click "Write Note" to start drawing, click the different pens to change to the corresponding color and click the Pen Size button in the top right to change the size. You can check your ink used meter though there's a ton of space to draw whatever you wish. You can also press the CLEAR button in the bottom right to clear your drawing, though you need to click it twice to confirm. press the SAVE button near the CLEAR button to save the current state of your art, the steps required to are guided. Click "Load" to check out other people's drawings. While here, you can press the "LOAD" button in the bottom right to import a drawing and watch it unfold. You can see the progress of how close the drawing is to being completely revealed, and see the current Pens and Pen sizes being used. Music: https://www.youtube.com/watch?v=T3h1EmRuMCg