How can I get image I drew?
Right click sleeve like canvas on bottom area.
Then, you can copy a code on this page to play on your own.
you will create a sprite sheet with its width is 200px by number of frames. For example, In 16 frames, it has width:3200px. Its height is 200px.
Where is an eraser?
I think you might complain about it has no eraser. Instead, use background color. It will weired when you drawing, but result is ok.(like cat image below). Or use undo button.