I thought it was cool that you could draw the hitboxes for obstacles and other things yourself, because my curved wall has a very incorrect hitbox that I can’t quite get right.
You can edit the hitbox by opening the object type (program editor), clicking on the object miniature, and then clicking on “Adjust contact contour” button. You can then choose the shape, and for polygonal shapes, adjust the points. Note that the hitbox must be convex.