For statement 1:
This is the rest of the code, that happens before the func _ physics_ process function :
func _ ready ():
_ init _ tween ()
func _ init _ tween ():
var d = moveto.length()/float(300)
tween.interpolateproperty(self,"follow",Vector2.ZERO,moveto, d, Tween.TRANSLINEAR,Tween.EASEINOUT,2)
tween.interpolateproperty(self,"follow",moveto, Vector2.ZERO, d, Tween.TRANSLINEAR, Tween.EASEIN_OUT, d + 2)
P.S tween is of type Tween
For statement 2:
This error appears when the Player sits on the Platform, or the Enemy ( they are type KinematicBody2D), and it is printed every frame of the game:
ERROR: Node not found: Platform.
For statement 3:
I don't have any code , I just have a CollisionShape2D created for each of Player, Enemy and Platform also.