How to make 'collisions' with tough and drag with godot

I create a node using a kinematicbody2D, and then apply sprite, collisionShape and touchScreenButtonn to it (with area above the kinematicbody). I create another collision node at the edge of the screen. I create the main node and join all the nodes.

The problem IS that when the kinematicbody must collide, it does so but very weak and goes through the collision. https://www.youtube.com/watch?v=UumM2Xz7_zk

extends KinematicBody2D
    
    
    var velocidad = Vector2()
    var movimiento = Vector2()
    var touchACT = false
    var newdeltax
    var deltax 
    
    func _on_TouchScreenButton_pressed():
        touchACT = true
    
    
    func _on_TouchScreenButton_released():
        touchACT = false
    
                
    func _input(event):
        if touchACT == true:
            if event is InputEventScreenTouch and event.is_pressed():
                velocidad = event.get_position()
                deltax = velocidad.x - position.x
            elif event is InputEventScreenDrag:
                velocidad = event.get_position()
                newdeltax = velocidad.x - deltax
                set_position(Vector2(newdeltax,0))
                
    func _physics_process(delta):
            
            move_and_collide(movimiento)

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