added a button :D

maps/rust.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=7 format=2]
+[gd_scene load_steps=9 format=2]
 
 [ext_resource path="res://maps/map.gd" type="Script" id=1]
 [ext_resource path="res://objects/Camera2D.tscn" type="PackedScene" id=2]
@@ -6,6 +6,8 @@
 [ext_resource path="res://tilesets/t_rust.tres" type="TileSet" id=4]
 [ext_resource path="res://objects/player/player.tscn" type="PackedScene" id=5]
 [ext_resource path="res://objects/enemy/robosnake.tscn" type="PackedScene" id=6]
+[ext_resource path="res://objects/enemy/steam.tscn" type="PackedScene" id=7]
+[ext_resource path="res://objects/environment/switches/button.tscn" type="PackedScene" id=8]
 
 [node name="Map" type="Node2D" groups=["map"]]
 pause_mode = 1
@@ -38,3 +40,14 @@ position = Vector2( 48, 152 )
 position = Vector2( 232, 168 )
 left_up_boundry = 4.0
 right_down_boundry = 4.0
+
+[node name="Steam" parent="Enemies" groups=["button1"] instance=ExtResource( 7 )]
+position = Vector2( 96, 152 )
+
+[node name="StaticBody2D" type="StaticBody2D" parent="."]
+
+[node name="CollisionPolygon2D" type="CollisionPolygon2D" parent="StaticBody2D"]
+polygon = PoolVector2Array( 145, 175, 183, 175, 184, 176, 184, 176, 144, 176, 144, 176 )
+
+[node name="Button" parent="." instance=ExtResource( 8 )]
+position = Vector2( 72, 168 )

objects/enemy/steam.gd

@@ -21,3 +21,6 @@ func _physics_process(delta):
 		active = true
 		collision_shape.disabled = false
 		particles.emitting = true
+
+func switch_action():
+	queue_free()

objects/environment/switches/button.gd

@@ -0,0 +1,10 @@
+extends "res://objects/environment/switches/switch.gd"
+
+var pressed = false
+
+func _on_ActivationArea_area_entered(area):
+	if !pressed:
+		if area.is_in_group("player"):
+			activate()
+			$Sprite.frame = 1
+			pressed = true

objects/environment/switches/button.tscn

@@ -0,0 +1,29 @@
+[gd_scene load_steps=4 format=2]
+
+[ext_resource path="res://graphics/switches/button.png" type="Texture" id=1]
+[ext_resource path="res://objects/environment/switches/button.gd" type="Script" id=2]
+
+[sub_resource type="RectangleShape2D" id=1]
+extents = Vector2( 2, 0.5 )
+
+[node name="Button" type="Node2D"]
+script = ExtResource( 2 )
+type = "button"
+
+[node name="Sprite" type="Sprite" parent="."]
+position = Vector2( 4, 4 )
+texture = ExtResource( 1 )
+hframes = 2
+
+[node name="StaticBody2D" type="StaticBody2D" parent="."]
+
+[node name="CollisionPolygon2D" type="CollisionPolygon2D" parent="StaticBody2D"]
+polygon = PoolVector2Array( 1, 7, 0, 8, 1, 8, 7, 8, 8, 8, 7, 7 )
+
+[node name="ActivationArea" type="Area2D" parent="."]
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="ActivationArea"]
+position = Vector2( 4, 6.5 )
+shape = SubResource( 1 )
+
+[connection signal="area_entered" from="ActivationArea" to="." method="_on_ActivationArea_area_entered"]

objects/environment/switches/switch.gd

@@ -0,0 +1,8 @@
+extends Node2D
+
+export var switch_index = 1
+export var type = "switch"
+
+func activate():
+	for object in get_tree().get_nodes_in_group(str(type) + str(switch_index)):
+		object.switch_action()