feat: add flashing on hit both on player and on the slime;

Scenes/Player/player.tscn

@@ -326,7 +326,7 @@ tracks/1/keys = {
 
 [sub_resource type="Animation" id="Animation_jlvik"]
 resource_name = "attack_left"
-length = 0.19999999999999998
+length = 0.2
 tracks/0/type = "value"
 tracks/0/imported = false
 tracks/0/enabled = true
@@ -381,7 +381,7 @@ tracks/1/keys = {
 
 [sub_resource type="Animation" id="Animation_0u5uq"]
 resource_name = "attack_up"
-length = 0.19999999999999998
+length = 0.2
 tracks/0/type = "value"
 tracks/0/imported = false
 tracks/0/enabled = true
@@ -423,7 +423,7 @@ script = ExtResource("1_a3d8c")
 
 [node name="AnimatedSprite2D" type="AnimatedSprite2D" parent="." unique_id=721334358]
 sprite_frames = SubResource("SpriteFrames_bqpwv")
-animation = &"death"
+animation = &"move_down"
 autoplay = "move_down"
 
 [node name="CollisionShape2D" type="CollisionShape2D" parent="." unique_id=129222135]