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

objects/environment/falling_block/falling_block.tscn

@@ -0,0 +1,38 @@
+[gd_scene load_steps=5 format=2]
+
+[ext_resource path="res://graphics/falling_block/falling_block_cave.png" type="Texture" id=1]
+[ext_resource path="res://objects/environment/falling_block/falling_block.gd" type="Script" id=2]
+
+[sub_resource type="RectangleShape2D" id=1]
+extents = Vector2( 4, 3.5 )
+
+[sub_resource type="RectangleShape2D" id=2]
+extents = Vector2( 4, 0.5 )
+
+[node name="FallingBlock" type="KinematicBody2D"]
+script = ExtResource( 2 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+visible = false
+position = Vector2( 4, 4.5 )
+shape = SubResource( 1 )
+
+[node name="Sprite" type="Sprite" parent="."]
+texture = ExtResource( 1 )
+centered = false
+
+[node name="VisibilityNotifier2D" type="VisibilityNotifier2D" parent="."]
+visible = false
+position = Vector2( 4, 4 )
+scale = Vector2( 0.4, 0.4 )
+
+[node name="Area2D" type="Area2D" parent="."]
+visible = false
+collision_mask = 2
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Area2D"]
+position = Vector2( 4, -0.5 )
+shape = SubResource( 2 )
+
+[connection signal="screen_exited" from="VisibilityNotifier2D" to="." method="_on_VisibilityNotifier2D_screen_exited"]
+[connection signal="area_entered" from="Area2D" to="." method="_on_Area2D_area_entered"]