【GameMaker】 Gradually rotating an object towards a target

Information about object: obj_projectile

Sprite: spr_projectile
Solid: false
Visible: true
Depth: 0
Persistent: false
Parent:
Children:
Mask:

No Physics Object

Step Event:

execute code:

var dir = point_direction(x, y, mouse_x, mouse_y);
var angle = angle_difference(image_angle, dir);
if abs(angle)<=25
{
image_angle -= angle;
}

Draw Event:

execute code:

draw_self();
draw_text(x-100,y,image_angle);