List of My Idea's.

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I want to add custom shapes, but the physics engine doesn't support concave shapes, which includes most of the ones you would want to draw.

How about instead of plain free-shapes, the shapes have to be a polygon - or they have to be connected. For example:
-_
/--\
|---|
\_/


It basically has to be enclosed. Will that work?

It not only has to be a polygon, it has to be convex too: https://secure.wikimedia.org/wikipedia/e...e_polygons

Oh, darn.