Changes.

Run, jump, walk, and fall animations all implemented. I can also toggle a double jump option on and off, and adjust jump values for height and such. Using the platformer behaviour set saved me a lot of grief there, as I don't think I could have done the 'coding' as well as creating and smoothing all of the animations. I discovered the in-engine editor, Pencyl, and it's wonderful. I was able to adjust the placement of each frame of animation from there, without having to continuously re-import my sprites.

Things to clean up if I get  the time: Movement into the fall animation looks a tiny bit jerky.
Additionally, my game tester tells me the seed is triple jumping. I'll fix that too.

v1.1