diff --git a/include/game/constants.hpp b/include/game/constants.hpp
index d66736c..ee3fcc4 100644
--- a/include/game/constants.hpp
+++ b/include/game/constants.hpp
@@ -1,11 +1,16 @@
 #pragma once
 
+#include "tinyengine/libmath.hpp"
+
 constexpr float FreightShipMaxSpeed = 100;
-constexpr float FightShipMaxSpeed = 300;
+constexpr float FightShipMaxSpeed = 250;
 constexpr int FreightLife = 10;
 constexpr float LazerDamage = 2;
 constexpr float LazerShooterSpeed = 500;
 constexpr float LazerShooterMaxSpeed = 1000;
 constexpr float LazerShooterCooldown = 0.3;
-constexpr int GameWindowWidth = 1024;
-constexpr int GameWindowHeight = 720;
+
+constexpr Size GameWindowSize = {1024, 720};
+
+constexpr Rect BulletRefreshArea{-100, -100, 1124, 820};
+constexpr Rect SpaceshipRefreshArea{-1024 * 3, -720 * 3, 1024 * 4, 720 * 4};
diff --git a/include/game/global.hpp b/include/game/global.hpp
index bb226e5..0e38b9a 100644
--- a/include/game/global.hpp
+++ b/include/game/global.hpp
@@ -9,7 +9,9 @@ extern Unique<TileSheet> GameTileSheet;
 extern std::unordered_map<std::string, Unique<Sound>> Sounds;
 
 extern QuickList<Entity*> Bullets;
-
 extern QuickList<Entity*> Entities;
 
+extern Entity* PlayerSpaceship;
+
 void LoadResources();
+Point MapGlobal2PlayerCoord(const Point& pos);
diff --git a/include/game/stages/gamelogo.hpp b/include/game/stages/gamelogo.hpp
index 79178ce..309e27c 100644
--- a/include/game/stages/gamelogo.hpp
+++ b/include/game/stages/gamelogo.hpp
@@ -7,7 +7,7 @@ public:
     void OnRender() override;
 
 private:
-    Camera camera;
+    Camera camera_;
     float initTime_;
     Unique<Sound> sound_;
     bool soundPlayed_;
diff --git a/include/game/stages/space.hpp b/include/game/stages/space.hpp
index d837121..c44cb3b 100644
--- a/include/game/stages/space.hpp
+++ b/include/game/stages/space.hpp
@@ -15,11 +15,11 @@ public:
     void OnQuit() override;
 
 private:
-    Entity* spaceship_;
     Unique<FreightShipController> freightController_;
     Unique<FightShipController> fightController_;
 
     void renderGUI();
+    void renderMiniMap();
 
     Camera guiCamera_;
     Camera gameCamera_;
diff --git a/include/tinyengine/camera.hpp b/include/tinyengine/camera.hpp
index 555767a..f74cc8a 100644
--- a/include/tinyengine/camera.hpp
+++ b/include/tinyengine/camera.hpp
@@ -9,11 +9,13 @@ public:
     void MoveTo(const Point& pos);
     /* scale screen in [1.0, 2.0] */
     void Scale(const Point& scale);
+    void SetAnchor(const Point& anchor);
     bool TryCalcView();
 
 private:
     Mat44 viewMat_;
     Point position_ = {0, 0};
     Point scale_ = {1, 1};
-    bool dirty_ = false;
+    Point anchor_ = {0, 0};
+    bool dirty_ = true;
 };
diff --git a/include/tinyengine/renderer.hpp b/include/tinyengine/renderer.hpp
index d100664..0e022a2 100644
--- a/include/tinyengine/renderer.hpp
+++ b/include/tinyengine/renderer.hpp
@@ -47,7 +47,6 @@ public:
     static void SetViewport(int x, int y, int w, int h);
     static const Color& GetDrawColor();
     static void SetCamera(Camera& camera);
-    static void Update();
 
 private:
     static Color color_;
diff --git a/src/game/action.cpp b/src/game/action.cpp
index eb00025..3665e26 100644
--- a/src/game/action.cpp
+++ b/src/game/action.cpp
@@ -5,7 +5,8 @@ void Shoot(SpaceshipWeaponCmpt& weapon, const Point& dir) {
 
     Point playerCenterPos = weapon.owner->Get<MoveCmpt>()->position;
 
-    auto bullet = weapon.ShootBullet(dir);
+    Entity* bullet;
+    bullet = weapon.ShootBullet(dir);
     Bullets.Add(bullet);
 
     weapon.coolDown = weapon.shootDuration;
diff --git a/src/game/controllers/fightship_controller.cpp b/src/game/controllers/fightship_controller.cpp
index d69495e..511cec7 100644
--- a/src/game/controllers/fightship_controller.cpp
+++ b/src/game/controllers/fightship_controller.cpp
@@ -26,8 +26,14 @@ void FightShipController::Update(float dt) {
 
     if (IsLeftPressing()) {
         if (entity_->Has<SpaceshipWeaponCmpt>()) {
-            Shoot(*entity_->Use<SpaceshipWeaponCmpt>(),
-                  GetMousePosition() - entity_->Get<MoveCmpt>()->position);
+            auto weapon = entity_->Use<SpaceshipWeaponCmpt>();
+            if (weapon->type == SpaceshipWeaponCmpt::Orientation) {
+                Shoot(*weapon,
+                      Rotate(Point{0, -1}, -entity_->Get<FightShipCmpt>()->degree));
+            } else {
+                Shoot(*weapon,
+                      GetMousePosition() - entity_->Get<MoveCmpt>()->position);
+            }
         }
     }
 }
diff --git a/src/game/controllers/freightship_controller.cpp b/src/game/controllers/freightship_controller.cpp
index 86df5eb..583703b 100644
--- a/src/game/controllers/freightship_controller.cpp
+++ b/src/game/controllers/freightship_controller.cpp
@@ -30,8 +30,15 @@ void FreightShipController::Update(float dt) {
 
     if (IsLeftPressing()) {
         if (entity_->Has<SpaceshipWeaponCmpt>()) {
-            Shoot(*entity_->Use<SpaceshipWeaponCmpt>(),
-                  GetMousePosition() - entity_->Get<MoveCmpt>()->position);
+            // FIXME duplicated codes in here and fightship_controller.cpp
+            auto weapon = entity_->Use<SpaceshipWeaponCmpt>();
+            if (weapon->type == SpaceshipWeaponCmpt::Orientation) {
+                Shoot(*weapon,
+                      Rotate(Point{0, -1}, entity_->Get<FightShipCmpt>()->degree));
+            } else {
+                Shoot(*weapon,
+                      GetMousePosition() - entity_->Get<MoveCmpt>()->position);
+            }
         }
     }
 }
diff --git a/src/game/entity.cpp b/src/game/entity.cpp
index 8c548a7..ccb248f 100644
--- a/src/game/entity.cpp
+++ b/src/game/entity.cpp
@@ -6,7 +6,7 @@ Entity* CreateFreightShip() {
     entity->Add<MoveCmpt>(Point{0, 0});
     entity->Add<MotionCmpt>(Point{0, 0}, FreightShipMaxSpeed);
     entity->Add<RenderCmpt>(GameTileSheet->GetTile(0, 0));
-    entity->Add<SpaceshipWeaponCmpt>(SpaceshipWeaponCmpt::Orientation,
+    entity->Add<SpaceshipWeaponCmpt>(SpaceshipWeaponCmpt::FreeRotation,
                                      entity,
                                      LazerDamage,
                                      LazerShooterSpeed,
diff --git a/src/game/global.cpp b/src/game/global.cpp
index 9e1819f..ebd357c 100644
--- a/src/game/global.cpp
+++ b/src/game/global.cpp
@@ -1,12 +1,16 @@
 #include "game/global.hpp"
+#include "game/component.hpp"
 
 Context ECSContext;
 SystemManager SystemMgr;
 Unique<TileSheet> GameTileSheet;
 std::unordered_map<std::string, Unique<Sound>> Sounds;
+
 QuickList<Entity*> Bullets;
 QuickList<Entity*> Entities;
 
+Entity* PlayerSpaceship;
+
 void loadImages() {
     GameTileSheet.reset(new TileSheet("assets/tilesheet.png", 8, 8));
 }
@@ -19,3 +23,11 @@ void LoadResources() {
     loadImages();
     loadSounds();
 }
+
+Point MapGlobal2PlayerCoord(const Point& pos) {
+    if (PlayerSpaceship && PlayerSpaceship->Has<MoveCmpt>()) {
+        return pos - PlayerSpaceship->Get<MoveCmpt>()->position + GameWindowSize / 2;
+    } else {
+        return pos;
+    }
+}
diff --git a/src/game/main.cpp b/src/game/main.cpp
index b0ab3cb..901e4a9 100644
--- a/src/game/main.cpp
+++ b/src/game/main.cpp
@@ -2,4 +2,4 @@
 #include "game/stages/space.hpp"
 #include "game/constants.hpp"
 
-RUN_WINDOW("Space Sector", GameWindowWidth, GameWindowHeight, SpaceScence)
+RUN_WINDOW("Space Sector", GameWindowSize.w, GameWindowSize.h, SpaceScence)
diff --git a/src/game/stages/gamelogo.cpp b/src/game/stages/gamelogo.cpp
index dc2839b..31937aa 100644
--- a/src/game/stages/gamelogo.cpp
+++ b/src/game/stages/gamelogo.cpp
@@ -10,6 +10,8 @@ void GameLogoScence::OnInit() {
     initTime_ = GetTime();
     sound_.reset(new Sound("assets/1mgame_sound.wav"));
     soundPlayed_ = false;
+
+    Renderer::SetCamera(camera_);
 }
 
 void GameLogoScence::OnRender() {
diff --git a/src/game/stages/space.cpp b/src/game/stages/space.cpp
index 226db14..66aba08 100644
--- a/src/game/stages/space.cpp
+++ b/src/game/stages/space.cpp
@@ -4,9 +4,12 @@ void SpaceScence::OnInit() {
     Renderer::SetClearColor(Color{0, 0, 0, 255});
     LoadResources();
 
-    spaceship_ = CreateFightShip();
-    Entities.Add(spaceship_);
-    spaceship_->Use<MoveCmpt>()->position = Point{400, 400};
+    Entities.Clear();
+    Bullets.Clear();
+
+    PlayerSpaceship = CreateFightShip();
+    Entities.Add(PlayerSpaceship);
+    PlayerSpaceship->Use<MoveCmpt>()->position = Point{400, 400};
 
     Entity* enemy = CreateFreightShip();
     enemy->Use<MoveCmpt>()->position = Point{100, 100};
@@ -21,7 +24,9 @@ void SpaceScence::OnInit() {
     Entities.Add(enemy);
 
     // freightController_.reset(new FreightShipController(spaceship_));
-    fightController_.reset(new FightShipController(spaceship_));
+    fightController_.reset(new FightShipController(PlayerSpaceship));
+
+    gameCamera_.SetAnchor(GameWindowSize / 2);
 
     SystemMgr.Clear();
     SystemMgr.AddUpdateSystem(new BulletCooldownSystem);
@@ -35,22 +40,53 @@ void SpaceScence::OnInit() {
 void SpaceScence::OnUpdate(float dt) {
     fightController_->Update(dt);
     SystemMgr.Update(dt);
+    gameCamera_.MoveTo(PlayerSpaceship->Get<MoveCmpt>()->position);
 }
 
 void SpaceScence::OnRender() {
     Renderer::SetCamera(gameCamera_);
     SystemMgr.Render();
+
+    Renderer::SetCamera(guiCamera_);
     renderGUI();
 }
 
 void SpaceScence::renderGUI() {
     Renderer::SetCamera(guiCamera_);
 
-    auto life = spaceship_->Get<LifeCmpt>()->hp;
+    auto life = PlayerSpaceship->Get<LifeCmpt>()->hp;
     float xOffset = 16 * life;
     for (int i = 0; i < life; i++) {
         Renderer::DrawTile(GameTileSheet->GetTile(1, 1),
-                           Point{GameWindowWidth - xOffset + i * 16, 8});
+                           Point{GameWindowSize.w - xOffset + i * 16, 8});
+    }
+
+    renderMiniMap();
+}
+
+void SpaceScence::renderMiniMap() {
+    Rect mapRect = {1, 0, 100, 100};
+    mapRect.y = GameWindowSize.h - mapRect.h;
+
+    Renderer::SetDrawColor(Color{0, 0, 0, 255});
+    Renderer::FillRect(mapRect);
+    Renderer::SetDrawColor(Color{255, 255, 255, 255});
+    Renderer::DrawRect(mapRect);
+
+    for (auto& entity: Entities) {
+        if (entity != PlayerSpaceship) {
+            const auto& pos = entity->Get<MoveCmpt>()->position;
+            Point entityOnMapPos = (pos - PlayerSpaceship->Get<MoveCmpt>()->position) * Size{mapRect.w, mapRect.h} / GameWindowSize +
+                                   Point{mapRect.x, mapRect.y} + Size{mapRect.w, mapRect.h} / 2;
+            if (IsPointInRect(entityOnMapPos, mapRect)) {
+                if (entity->Has<FreightShipCmpt>()) {
+                    Renderer::SetDrawColor(Color{255, 255, 255, 255});
+                } else {
+                    Renderer::SetDrawColor(Color{0, 0, 255, 255});
+                }
+                Renderer::FillRect(Rect{entityOnMapPos.x - 1, entityOnMapPos.y - 1, 2, 2});
+            }
+        }
     }
 }
 
diff --git a/src/game/system.cpp b/src/game/system.cpp
index 674b56d..f045f00 100644
--- a/src/game/system.cpp
+++ b/src/game/system.cpp
@@ -75,21 +75,26 @@ void CollideSystem::Update(float dt) {
 
 void CleanupSystem::Update(float dt) {
     using EntityPtr = Entity*;
+    auto destroyFunc = [&](const EntityPtr& entity){
+        ECSContext.DestroyEntity(entity);
+    };
+
     Bullets.RemoveAll([](const EntityPtr& entity){
-        return !entity->Get<BulletCmpt>()->alive || !IsPointInRect(entity->Get<MoveCmpt>()->position,
-                              Rect{0, 0, GameWindowWidth, GameWindowHeight});
-    });
+        return !entity->Get<BulletCmpt>()->alive ||
+               !IsPointInRect(MapGlobal2PlayerCoord(entity->Get<MoveCmpt>()->position),
+                              BulletRefreshArea);
+    }, destroyFunc);
+
     Entities.RemoveAll([](const EntityPtr& entity){
         if (entity->Has<LifeCmpt>() &&
-            entity->Get<LifeCmpt>()->hp <= 0) {
+            entity->Get<LifeCmpt>()->hp <= 0 ||
+            entity->Has<MoveCmpt>() &&
+            !IsPointInRect(MapGlobal2PlayerCoord(entity->Get<MoveCmpt>()->position), SpaceshipRefreshArea)) {
             return true;
         } else {
             return false;
         }
-    },
-    [&](const EntityPtr& entity){
-        ECSContext.DestroyEntity(entity);
-    });
+    }, destroyFunc);
 }
 
 void BulletCooldownSystem::Update(float dt) {
diff --git a/src/tinyengine/camera.cpp b/src/tinyengine/camera.cpp
index c484974..430f24a 100644
--- a/src/tinyengine/camera.cpp
+++ b/src/tinyengine/camera.cpp
@@ -3,8 +3,8 @@
 bool Camera::TryCalcView() {
     if (dirty_) {
         viewMat_ = Mat44({
-                    scale_.x,        0, 0, -position_.x,
-                           0, scale_.y, 0, -position_.y,
+                    scale_.x,        0, 0, -position_.x + anchor_.x,
+                           0, scale_.y, 0, -position_.y + anchor_.y,
                            0,        0, 1,            0,
                            0,        0, 0,            1,
                 });
@@ -30,3 +30,8 @@ void Camera::Scale(const Point& scale) {
     scale_.y = Clamp(1.0f, 2.0f, scale.y);
     dirty_ = true;
 }
+
+void Camera::SetAnchor(const Point& anchor) {
+    anchor_ = anchor;
+    dirty_ = true;
+}
diff --git a/src/tinyengine/engine.cpp b/src/tinyengine/engine.cpp
index d0ed153..614be92 100644
--- a/src/tinyengine/engine.cpp
+++ b/src/tinyengine/engine.cpp
@@ -89,7 +89,6 @@ void Engine::Shutdown() {
 void Engine::Update(float deltaTime) {
     if (scence_)
         scence_->OnUpdate(deltaTime);
-    Renderer::Update();
 }
 
 void Engine::Render() {
diff --git a/src/tinyengine/renderer.cpp b/src/tinyengine/renderer.cpp
index 188e6f7..0e1b808 100644
--- a/src/tinyengine/renderer.cpp
+++ b/src/tinyengine/renderer.cpp
@@ -229,14 +229,8 @@ void Renderer::SetViewport(int x, int y, int w, int h) {
 
 void Renderer::SetCamera(Camera& camera) {
     Context.camera = &camera;
-}
-
-void Renderer::Update() {
-    if (Context.camera && Context.camera->TryCalcView()) {
-        Context.shader->SetMat4("view", Context.camera->GetView());
-    } else {
-        Context.shader->SetMat4("view", Mat44::Eye);
-    }
+    Context.camera->TryCalcView();
+    Context.shader->SetMat4("view", Context.camera->GetView());
 }
 
 void Renderer::Shutdown() {