Every tick - Sprite A - Set Y to self.Y-1
increase the number to move faster
to smooth it out when using larger numbers use:
Every tick - Sprite A - Set Y to lerp(self.y,self.y-10,0.5)
again, increase the -10 number to make it faster
Thanks for your answer. But when I write the parameters you give in my game, it goes down. I want the game to move up.