So I tried to load some .swf (flash) joystick animations into AM, and they did load however the colors were all messed up and I figured it may have been do to the still limited flash support. So what I did was created a sprite sheet from my flash file and added the sprite animation to my theme. Depending on what joystick animation you are using you might just be able to add the swf and it might play just fine. if not here is some sprite code if you want to go that route.
// Attempt for joystick animation sprite sheet
//sprite animation - use a spritesheet to animate specific frames of the sprite sheet
local joystick_up = fe.add_image("joysprite.png", (fe.layout.width / 2) - 480, fe.layout.height - 180, 300, 200);
local sprite_cfg = {
when = When.Always,
orientation = "vertical",
height = 116,
width = 242,
frame = 0,
time = 1000,
order = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10],
repeat = "yoyo",
loop = true
}
animation.add( SpriteAnimation( joystick_up, sprite_cfg ) );
keep in mind depending on your sprite sheet the setting will be a bit different