Implemented demon enemy combat, enemy knockback, and directional player attacks

- Added Demon enemy scene with detection, pursuit, attack, hurt, and death states
- Configured Demon collision layers, detection area, and attack hitbox
- Fixed Demon movement to pursue player horizontally and attack at close range
- Allowed enemy/player overlap for melee combat encounters
- Added enemy damage and death handling
- Added knockback system for enemies when hit
- Fixed player punch hitbox positioning based on facing direction
- Corrected directional melee attacks so enemies can be hit from both left and right sides
- Fixed collision mask issues affecting floors and enemy detection
- Improved memory piece pickup interaction to support button-based collection
- Continued testing and debugging combat interactions in Graveyard and Demon levels

Scenes/Characters/Demon.tscn

@@ -242,8 +242,7 @@ script = ExtResource("1_02sxe")
 
 [node name="AnimatedSprite2D" type="AnimatedSprite2D" parent="."]
 sprite_frames = SubResource("SpriteFrames_02sxe")
-animation = &"flying"
-frame_progress = 0.13023382
+animation = &"hurt"
 
 [node name="CollisionShape2D" type="CollisionShape2D" parent="."]
 position = Vector2(-2, 2)

Scenes/Characters/Player.tscn

@@ -693,14 +693,18 @@ animations = [{
 [node name="CharacterBody2D" type="CharacterBody2D"]
 z_index = 10
 position = Vector2(2, -1)
+collision_mask = 3
 script = ExtResource("1_0y7nr")
 metadata/_edit_group_ = true
 
 [node name="PunchHitbox" type="Area2D" parent="."]
+visibility_layer = 2
+position = Vector2(50.5, -5)
+collision_layer = 4
+collision_mask = 2
 monitoring = false
 
 [node name="CollisionShape2D" type="CollisionShape2D" parent="PunchHitbox"]
-position = Vector2(50.5, -5)
 shape = SubResource("RectangleShape2D_miouo")
 debug_color = Color(0.97765833, 0.1351085, 0.16903454, 0.41960785)
 

Scenes/Characters/Skeleton.tscn

@@ -368,6 +368,7 @@ size = Vector2(452, 33)
 
 [node name="Skeleton" type="CharacterBody2D"]
 z_index = 10
+collision_layer = 2
 script = ExtResource("1_abfcy")
 
 [node name="AnimatedSprite2D" type="AnimatedSprite2D" parent="."]
@@ -390,6 +391,7 @@ shape = SubResource("RectangleShape2D_yek4v")
 debug_color = Color(0.51556015, 0.56157154, 0.37343058, 0.41960785)
 
 [node name="AttackHitbox" type="Area2D" parent="."]
+collision_layer = 8
 
 [node name="CollisionShape2D" type="CollisionShape2D" parent="AttackHitbox"]
 position = Vector2(37, 0.5)