So basically, to start drawing, you click on the "w" button. To stop drawing, you click the "s" button. You use the arrow keys to control where you draw. If you want to erase something, press the "f" button. and then move your mouse around. To stop erasing, press the "D" button.
There are still some bugs with the eraser, like it won't erase the left hand side. I know about those and I will fix them as soon as possible. Anyway, let's see what you can create. Enjoy! Also, another one of the projects I shared has some bug, and you can't find it if you search up my name. Here it is: https://scratch.mit.edu/projects/974491296/ Try it out!