added a basic ball that properly inverts velocity when colliding with a world boundary. my balls are getting stuck on each other tho

balls/ball.gd

@@ -0,0 +1,17 @@
+extends CharacterBody2D
+
+@export var speed: float = 5
+const _speed_mult: float = 200
+var _direction: Vector2 = Vector2(1.0, 0.5)
+
+func _physics_process(delta):
+	velocity.x = speed * _speed_mult * _direction.x
+	velocity.y = speed * _speed_mult * _direction.y
+
+	move_and_slide()
+
+func invert_x():
+	_direction.x *= -1
+
+func invert_y():
+	_direction.y *= -1