diff --git a/prefab/Bullet.tscn b/prefab/Bullet.tscn
deleted file mode 100644
index 19d9c8e..0000000
--- a/prefab/Bullet.tscn
+++ /dev/null
@@ -1,24 +0,0 @@
-[gd_scene load_steps=4 format=2]
-
-[ext_resource path="res://src/weapon/bullet/HighSpeedBullet.cs" type="Script" id=1]
-
-[sub_resource type="Curve" id=1]
-_data = [ Vector2( 0, 0.781588 ), 0.0, 0.0, 0, 0, Vector2( 1, 1 ), 0.0, 0.0, 0, 0 ]
-
-[sub_resource type="Gradient" id=2]
-colors = PoolColorArray( 1, 1, 1, 0.313726, 1, 1, 1, 0.784314 )
-
-[node name="Bullet" type="Node2D"]
-script = ExtResource( 1 )
-
-[node name="Line" type="Line2D" parent="."]
-points = PoolVector2Array( 0, 0, 0, 10 )
-width = 1.0
-width_curve = SubResource( 1 )
-default_color = Color( 1, 1, 1, 1 )
-gradient = SubResource( 2 )
-begin_cap_mode = 2
-end_cap_mode = 2
-
-[node name="RayCast2D" type="RayCast2D" parent="."]
-visible = false
diff --git a/prefab/bullet/Bullet.tscn b/prefab/bullet/Bullet.tscn
new file mode 100644
index 0000000..eb6d9ff
--- /dev/null
+++ b/prefab/bullet/Bullet.tscn
@@ -0,0 +1,27 @@
+[gd_scene load_steps=5 format=2]
+
+[ext_resource path="res://src/weapon/bullet/HighSpeedBullet.cs" type="Script" id=1]
+[ext_resource path="res://prefab/effect/Hit.tscn" type="PackedScene" id=2]
+
+[sub_resource type="Curve" id=1]
+_data = [ Vector2( 0, 0.781588 ), 0.0, 0.0, 0, 0, Vector2( 1, 1 ), 0.0, 0.0, 0, 0 ]
+
+[sub_resource type="Gradient" id=2]
+colors = PoolColorArray( 1, 1, 1, 0.313726, 1, 1, 1, 0.784314 )
+
+[node name="Bullet" type="Node2D"]
+script = ExtResource( 1 )
+Hit = ExtResource( 2 )
+
+[node name="Line" type="Line2D" parent="."]
+modulate = Color( 1, 0.937255, 0.843137, 1 )
+points = PoolVector2Array( 0, 0, 0, 10 )
+width = 1.0
+width_curve = SubResource( 1 )
+default_color = Color( 1, 1, 1, 1 )
+gradient = SubResource( 2 )
+begin_cap_mode = 2
+end_cap_mode = 2
+
+[node name="RayCast2D" type="RayCast2D" parent="."]
+visible = false
diff --git a/prefab/effect/Hit.tscn b/prefab/effect/Hit.tscn
new file mode 100644
index 0000000..23b68c5
--- /dev/null
+++ b/prefab/effect/Hit.tscn
@@ -0,0 +1,25 @@
+[gd_scene load_steps=8 format=2]
+
+[ext_resource path="res://resource/sprite/effect/hit/hit2.png" type="Texture" id=1]
+[ext_resource path="res://resource/sprite/effect/hit/hit1.png" type="Texture" id=2]
+[ext_resource path="res://resource/sprite/effect/hit/hit4.png" type="Texture" id=3]
+[ext_resource path="res://resource/sprite/effect/hit/hit0.png" type="Texture" id=4]
+[ext_resource path="res://resource/sprite/effect/hit/hit3.png" type="Texture" id=5]
+[ext_resource path="res://src/effect/Hit.cs" type="Script" id=6]
+
+[sub_resource type="SpriteFrames" id=1]
+animations = [ {
+"frames": [ ExtResource( 4 ), ExtResource( 2 ), ExtResource( 1 ), ExtResource( 5 ), ExtResource( 3 ) ],
+"loop": true,
+"name": "Hit",
+"speed": 20.0
+} ]
+
+[node name="Hit" type="AnimatedSprite"]
+frames = SubResource( 1 )
+animation = "Hit"
+playing = true
+offset = Vector2( 1, 11 )
+script = ExtResource( 6 )
+
+[connection signal="animation_finished" from="." to="." method="_on_Hit_animation_finished"]
diff --git a/scene/Room.tscn b/scene/Room.tscn
index 2941b91..c310d11 100644
--- a/scene/Room.tscn
+++ b/scene/Room.tscn
@@ -18,12 +18,8 @@
 position = Vector2( 196, 128 )
 current = true
 process_mode = 0
-drag_margin_h_enabled = true
-drag_margin_v_enabled = true
 smoothing_enabled = true
 smoothing_speed = 8.0
-editor_draw_limits = true
-editor_draw_drag_margin = true
 
 [node name="Player" parent="." instance=ExtResource( 1 )]
 position = Vector2( 196, 128 )
diff --git a/src/effect/Hit.cs b/src/effect/Hit.cs
new file mode 100644
index 0000000..3bb55f5
--- /dev/null
+++ b/src/effect/Hit.cs
@@ -0,0 +1,12 @@
+using Godot;
+
+public class Hit : AnimatedSprite
+{
+    /// <summary>
+    /// 动画结束, 销毁
+    /// </summary>
+	private void _on_Hit_animation_finished()
+    {
+        QueueFree();
+    }
+}
\ No newline at end of file
diff --git a/src/role/Player.cs b/src/role/Player.cs
index 455f6e6..0433346 100644
--- a/src/role/Player.cs
+++ b/src/role/Player.cs
@@ -29,11 +29,11 @@
         CurrGun = gun;
 
         var attr = new GunAttribute();
-        attr.FiringSpeed = 600;
-        attr.StartScatteringRange = 0;
-        attr.FinalScatteringRange = 0;
-        attr.ScatteringRangeAddValue = 5;
-        attr.ScatteringRangeBackSpeed = 30;
+        attr.StartFiringSpeed = 600;
+        attr.StartScatteringRange = 5;
+        attr.FinalScatteringRange = 60;
+        attr.ScatteringRangeAddValue = 2f;
+        attr.ScatteringRangeBackSpeed = 40;
         //连发
         attr.ContinuousShoot = true;
         //扳机检测间隔
@@ -42,7 +42,7 @@
         attr.MinContinuousCount = 3;
         attr.MaxContinuousCount = 3;
         //开火前延时
-        attr.DelayedTime = 0.5f;
+        attr.DelayedTime = 0f;
         //攻击距离
         attr.MinDistance = 500;
         attr.MaxDistance = 600;
diff --git a/src/weapon/bullet/HighSpeedBullet.cs b/src/weapon/bullet/HighSpeedBullet.cs
index dcd7173..e71eeba 100644
--- a/src/weapon/bullet/HighSpeedBullet.cs
+++ b/src/weapon/bullet/HighSpeedBullet.cs
@@ -5,6 +5,7 @@
 /// </summary>
 public class HighSpeedBullet : Bullet
 {
+    [Export] public PackedScene Hit;
     //射线检测节点
     private RayCast2D RayCast2D;
     //最大飞行距离
@@ -24,9 +25,14 @@
         //
         RayCast2D.CastTo = targetPos;
         RayCast2D.ForceRaycastUpdate();
-        if (RayCast2D.IsColliding()) {
+        if (RayCast2D.IsColliding()) { //碰到物体
+            Vector2 collPosition = RayCast2D.GetCollisionPoint();
+            Node2D hit = Hit.Instance<Node2D>();
+            hit.RotationDegrees = MathUtils.RandRangeInt(0, 360);
+            hit.GlobalPosition = collPosition;
+            GetTree().CurrentScene.AddChild(hit);
             //划线的点坐标
-            Line.SetPointPosition(1, new Vector2(Line.GlobalPosition.DistanceTo(RayCast2D.GetCollisionPoint()), 0));
+            Line.SetPointPosition(1, new Vector2(Line.GlobalPosition.DistanceTo(collPosition), 0));
         }
         else
         {
diff --git a/src/weapon/gun/Gun.cs b/src/weapon/gun/Gun.cs
index 3900e80..f32823c 100644
--- a/src/weapon/gun/Gun.cs
+++ b/src/weapon/gun/Gun.cs
@@ -252,7 +252,7 @@
     private void TriggernFire()
     {
         continuousCount = continuousCount > 0 ? continuousCount - 1 : 0;
-        fireInterval = 60 / Attribute.FiringSpeed;
+        fireInterval = 60 / Attribute.StartFiringSpeed;
         attackTimer += fireInterval;
         
         //触发开火函数
diff --git a/src/weapon/gun/GunAttribute.cs b/src/weapon/gun/GunAttribute.cs
index f3ebc4e..aaeab64 100644
--- a/src/weapon/gun/GunAttribute.cs
+++ b/src/weapon/gun/GunAttribute.cs
@@ -14,6 +14,10 @@
     /// </summary>
     public bool ContinuousShoot = true;
     /// <summary>
+    /// 是否为松发开火, 也就是松开扳机才开火, 若要启用该属性, 必须将 'ContinuousShoot' 设置为 false
+    /// </summary>
+    public bool LooseShoot = false;
+    /// <summary>
     /// 连续发射最小次数, 仅当ContinuousShoot为false时生效
     /// </summary>
     public int MinContinuousCount = 3;
@@ -26,9 +30,21 @@
     /// </summary>
     public float TriggerInterval = 0;
     /// <summary>
-    /// 射速, 每秒分钟能发射多少发子弹
+    /// 初始射速, 初始每秒分钟能发射多少发子弹
     /// </summary>
-    public float FiringSpeed = 300;
+    public float StartFiringSpeed = 300;
+    /// <summary>
+    /// 最终射速, 最终每秒分钟能发射多少发子弹
+    /// </summary>
+    public float FinalFiringSpeed = 300;
+    /// <summary>
+    /// 按下扳机并开火后射速增加速率
+    /// </summary>
+    public float FiringSpeedAddSpeed = 2;
+    /// <summary>
+    /// 松开扳机后射速消散速率
+    /// </summary>
+    public float FiringSpeedBackSpeed = 10;
     /// <summary>
     /// 单次开火发射子弹最小数量
     /// </summary>
diff --git a/src/weapon/gun/OrdinaryGun.cs b/src/weapon/gun/OrdinaryGun.cs
index a5960f0..047da0c 100644
--- a/src/weapon/gun/OrdinaryGun.cs
+++ b/src/weapon/gun/OrdinaryGun.cs
@@ -12,7 +12,7 @@
     protected override void Init()
     {
         //子弹
-        bulletPacked = ResourceLoader.Load<PackedScene>("res://prefab/Bullet.tscn");
+        bulletPacked = ResourceLoader.Load<PackedScene>("res://prefab/bullet/Bullet.tscn");
     }
 
     protected override void Fire()