Whoo, this one's got me wracking my brain.
I'm using the Platform Movement Object, and I'm making a game that uses more than just jumping and walking. There are four attacks in the game, each with an animation. Pressing the X key for example should go through with the animation. But it doesn't play, and I sort of have an idea why, but I can't figure out how. It looks like it's trying to play - it quickly flashes the first frame of the animation.
It's probably something to do with part 15.
I guess I should note that the "X" key is not one of the default joystick buttons - I set the event via the "press a key" function (as seen there). I can change it so that X is a default joystick button if needed.