image_angle
Returns: Real
This value sets the angle (rotation) of the sprite and is measured in degrees, with the right being 0�, up being 90�, left being 180� and down being 270�. Set this variable to 0 to reset the sprite to be
drawn as was defined in the sprite editor. Please note that for changes in this variable to be visible, the instance should have either no draw event (and so GameMaker: Studio will default
draw the sprite) or be drawn using one of the extended drawing functions like draw_self() or
draw_sprite_ext().
image_angle = point_direction(x, y, mouse_x, mouse_y);
The above code will rotate the sprite of the instance to always point at the mouse position.