godot 4, player movement hop

Platform.gd

extends Area2D


func _on_body_entered(body: Node2D) -> void:
	if body is Player:
		if body.velocity.y > 0:
			body.jump()
		
		

Player.gd

extends CharacterBody2D
class_name Player
var speed = 300.0
var viewport_size
var gravity = 15
var max_fall_velocity = 1000.0
var jump_velocity = -800

@onready var animator = $AnimationPlayer

func jump() -> void:
	velocity.y = jump_velocity

func _ready() -> void:
	viewport_size = get_viewport_rect().size
	
func _process(delta: float) -> void:
	if velocity.y > 0:
		if animator.current_animation != "fall":
			animator.play("fall")
	elif velocity.y < 0:
		if animator.current_animation != "jump":
			animator.play("jump")
		

func _physics_process(delta: float) -> void:
	velocity.y += gravity
	if velocity.y > max_fall_velocity:
		velocity.y = max_fall_velocity
	var direction = Input.get_axis("move_left", "move_right")
	#print(direction)
	if direction:
		velocity.x = direction * speed
	else:
		velocity.x = move_toward(velocity.x, 0, speed)
	move_and_slide()
	var margin = 20
	if global_position.x > viewport_size.x + margin:
		global_position.x = -margin
	if global_position.x < 0 - margin:
		global_position.x = viewport_size.x + margin