Made some changes :)

objects/enemy/bat.tscn

@@ -0,0 +1,48 @@
+[gd_scene load_steps=9 format=2]
+
+[ext_resource path="res://scripts/1px_border.gdshader" type="Shader" id=1]
+[ext_resource path="res://graphics/enemy/bat.png" type="Texture" id=2]
+[ext_resource path="res://objects/enemy/enemy_move_sidesideupdown.gd" type="Script" id=3]
+
+[sub_resource type="ShaderMaterial" id=1]
+shader = ExtResource( 1 )
+shader_param/border_color = Color( 0, 0, 0, 1 )
+shader_param/border_corners = false
+
+[sub_resource type="AtlasTexture" id=2]
+atlas = ExtResource( 2 )
+region = Rect2( 0, 0, 18, 10 )
+
+[sub_resource type="AtlasTexture" id=3]
+atlas = ExtResource( 2 )
+region = Rect2( 18, 0, 18, 10 )
+
+[sub_resource type="SpriteFrames" id=4]
+animations = [ {
+"frames": [ SubResource( 2 ), SubResource( 3 ) ],
+"loop": true,
+"name": "default",
+"speed": 8.0
+} ]
+
+[sub_resource type="RectangleShape2D" id=5]
+extents = Vector2( 5, 5 )
+
+[node name="Bat" type="Node2D"]
+script = ExtResource( 3 )
+can_be_killed_by_sword = false
+speed = 40
+move_direction = 1
+flip_sprite = false
+
+[node name="AnimatedSprite" type="AnimatedSprite" parent="."]
+material = SubResource( 1 )
+frames = SubResource( 4 )
+playing = true
+
+[node name="Area2D" type="Area2D" parent="."]
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Area2D"]
+shape = SubResource( 5 )
+
+[connection signal="area_entered" from="Area2D" to="." method="_on_Area2D_area_entered"]

objects/enemy/enemy.gd

@@ -2,6 +2,7 @@ extends Node2D
 
 export var can_be_killed_by_sword = true
 export var can_be_squashed = true
+export var score_for_killing = 0
 
 func _on_Area2D_area_entered(area):
 	#Kill player
@@ -10,9 +11,15 @@ func _on_Area2D_area_entered(area):
 	#Die from sword
 	if area.is_in_group("sword"):
 		if can_be_killed_by_sword:
-			queue_free()
+			die()
+		else:
+			Game.instance_node(Game.block_text,global_position.x,global_position.y,get_parent())
 	#Die from rock/ get squashed
 	if area.is_in_group("squash"):
 		var squasher = area.get_parent()
 		if squasher.position.y + squasher.bottom.position.y < global_position.y:
-			queue_free()
+			die()
+
+func die():
+	Game.score += score_for_killing
+	queue_free()

objects/enemy/slime.tscn

@@ -32,14 +32,16 @@ extents = Vector2( 5.5, 4.5 )
 
 [node name="Slime" type="Node2D"]
 script = ExtResource( 4 )
+score_for_killing = 10
 
 [node name="AnimatedSprite" type="AnimatedSprite" parent="."]
 material = SubResource( 1 )
-position = Vector2( 5, 3 )
+position = Vector2( 1, 3 )
 frames = SubResource( 4 )
 playing = true
 
 [node name="Area2D" type="Area2D" parent="."]
+position = Vector2( -4, 0 )
 
 [node name="CollisionShape2D" type="CollisionShape2D" parent="Area2D"]
 position = Vector2( 4.5, 3.5 )

objects/enemy/snake.tscn

@@ -30,10 +30,12 @@ extents = Vector2( 8, 8 )
 
 [node name="Snake" type="Node2D"]
 script = ExtResource( 3 )
+score_for_killing = 15
 
 [node name="AnimatedSprite" type="AnimatedSprite" parent="."]
 material = SubResource( 1 )
 frames = SubResource( 4 )
+frame = 1
 playing = true
 
 [node name="Area2D" type="Area2D" parent="."]