diff --git a/core/src/sagittarius/model/MouseInfo.java b/core/src/sagittarius/model/MouseInfo.java
index 1793788..a5f77b9 100644
--- a/core/src/sagittarius/model/MouseInfo.java
+++ b/core/src/sagittarius/model/MouseInfo.java
@@ -1,29 +1,25 @@
 package sagittarius.model;
 
-import com.badlogic.gdx.graphics.g2d.Batch;
-import com.badlogic.gdx.graphics.g2d.BitmapFont;
-import com.badlogic.gdx.scenes.scene2d.Actor;
-
 import sagittarius.view.GameScreen;
 
-public class MouseInfo extends Actor {
+public class MouseInfo extends BaseActor {
 
-// ---------- ATTRIBUTEs ----------
-
-    private BitmapFont font = new BitmapFont();
 
 // ---------- METHODs ----------
 
     @Override
-    public void draw(Batch batch, float parentAlpha) {
-        super.draw(batch, parentAlpha);
-
-        font.draw(batch, "screen=" + (int)GameScreen.screenCursor.x + "," + (int)GameScreen.screenCursor.y,
-            GameScreen.worldCursor.x, GameScreen.worldCursor.y + font.getCapHeight());
-
-        font.draw(batch, "world=" + (int)GameScreen.worldCursor.x + "," + (int)GameScreen.worldCursor.y,
-            GameScreen.worldCursor.x, GameScreen.worldCursor.y + font.getCapHeight()*2);
+    public void act(float delta) {
+        super.act(delta);
+        setX(GameScreen.worldCursor.x);
+        setY(GameScreen.worldCursor.y);
+    }
 
+    @Override
+    protected String getInfo() {
+        return
+            "screen=" + (int)GameScreen.screenCursor.x + "," + (int)GameScreen.screenCursor.y + "\n"
+        +   "world=" + (int)GameScreen.worldCursor.x + "," + (int)GameScreen.worldCursor.y
+        ;
     }
 
 }
diff --git a/core/src/sagittarius/view/BaseScreen.java b/core/src/sagittarius/view/BaseScreen.java
index 696ee4f..7e29a1b 100644
--- a/core/src/sagittarius/view/BaseScreen.java
+++ b/core/src/sagittarius/view/BaseScreen.java
@@ -6,10 +6,10 @@ import com.badlogic.gdx.scenes.scene2d.Stage;
 import com.badlogic.gdx.Screen;
 
 public abstract class BaseScreen implements Screen {
-    
+
     protected Stage mainStage;
     protected Stage uiStage;
-    
+
     public BaseScreen() {
         mainStage = new Stage();
         uiStage = new Stage();
@@ -18,26 +18,26 @@ public abstract class BaseScreen implements Screen {
 
     public abstract void initialize();
     public abstract void update(float dt);
-    
+
     @Override
     public void render(float dt) {
-        
+
+        // update
+        update(dt);
+
         // update Stages
         uiStage.act(dt);
         mainStage.act(dt);
-        
-        // update
-        update(dt);
 
         // clear screen
         Gdx.gl.glClearColor(0,0,0,1);
         Gdx.gl.glClear(GL30.GL_COLOR_BUFFER_BIT);
-        
+
         // draw actors on screnn
         mainStage.draw();
         uiStage.draw();
     }
-    
+
     @Override public void dispose() {
         uiStage.dispose();
         mainStage.dispose();
diff --git a/core/src/sagittarius/view/GameScreen.java b/core/src/sagittarius/view/GameScreen.java
index 90c313c..401dd12 100644
--- a/core/src/sagittarius/view/GameScreen.java
+++ b/core/src/sagittarius/view/GameScreen.java
@@ -59,6 +59,7 @@ public class GameScreen extends BaseScreen {
         uiStage.addActor(mouseInfo);
 
         mainStage.setDebugAll(true); // TODO: disable later
+        uiStage.setDebugAll(true); // TODO: disable later
 
     }