In an update that took a lot longer than expected, I've just now added in a new art tool which should be very helpful for drawing complicated shapes. Originally polygon shapes could be interactive or non-interactive. Instead, all polygons must now be interactive, and previous art polygons are now art shapes. Art shapes are superior as they will allow you to draw using bezier curves, and are completely scalable. Each vertex of each shape will have its own handles which control the curve of the line. When placing vertices and creating your shape, click, hold and drag your mouse to adjust the handles.
I've also put the whole drawing of shapes process into the undo chain, so you can undo and redo the drawing of your shape like everything else in the editor. Once created, you can now double click on polygon or art shapes (using the arrow tool) to manually edit their vertices. You can delete vertices with delete, and create new vertices by selecting a vertex and hitting enter. Double click on vertices in art shapes to show their bezier handles if they are hidden. Drag them back into the vertex to remove them and use straight lines.
Artshapes, unlike polygon shapes, are scaleable with a,s,d,w.
I think that's it. I originally put a version of this into a developmental version of the game to assist in building levels for the iphone game. It then seemed like a waste not to reuse the code in the full game, so here it is. I will now go back to my work on the sequel. uhhhh... SEEYA!