add falling block

objects/environment/falling_block/falling_block.gd

@@ -0,0 +1,18 @@
+extends KinematicBody2D
+
+var fall = false
+export var fall_speed = 0.5
+onready var startpos = position
+
+func _physics_process(delta):
+	if fall:
+		position.y += fall_speed
+
+func _on_Area2D_area_entered(area):
+	if area.is_in_group("player"):
+		fall = true
+
+
+func _on_VisibilityNotifier2D_screen_exited():
+	position = startpos
+	fall = false