I see people asking and get replies here so here is mine.
When I press space, The sprite deactivates the platform behavior, plays an animation ("aim")
and everything is OK
When I release space, the animation("aimdown) does not play (or so it seems) and the sprite activates the platform behavior again.
Why can't I see the animation? Does the activation of the behavior stops the animation before it plays? how can I "give some time" to the animation to play, if that's the case?
If you need more info, I will post the cap file