Batting Game - Did the Bat hit the Ball

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Delete the three rows:
  if (bally > height - balld/2) {
    speedy = -speedy;
  }

Insert before   } //draw
  if (350 - balld/2 < bally
   && bally - balld/2 < 355
   && mouseX - 40 <= ballx
   && ballx <= mouseX + 40) {
    speedy = -(speedy + 2);
    score += 1;
  }

// Insert F Code Here