diff --git a/src/sg/SpaceGame.java b/src/sg/SpaceGame.java
index ff38069..6505164 100644
--- a/src/sg/SpaceGame.java
+++ b/src/sg/SpaceGame.java
@@ -12,20 +12,19 @@ import com.jme.scene.state.TextureState;
 import com.jme.image.Texture;
 import com.jme.math.Vector3f;
 import com.jme.util.TextureManager;
-//import com.jmex.physics.DynamicPhysicsNode;
-//import com.jmex.physics.StaticPhysicsNode;
-//import com.jmex.physics.geometry.PhysicsBox;
-//import com.jmex.physics.util.SimplePhysicsGame;
+import com.jmex.physics.DynamicPhysicsNode;
+import com.jmex.physics.StaticPhysicsNode;
+import com.jmex.physics.util.SimplePhysicsGame;
 
-public class SpaceGame extends SimpleGame {
-	//private StaticPhysicsNode staticNode;
-	//private DynamicPhysicsNode dynamicNode;
+public class SpaceGame extends SimplePhysicsGame {
+	private StaticPhysicsNode staticNode;
+	private DynamicPhysicsNode dynamicNode;
 	private Environment environment;
 
 	public static void main(String[] args) {
 		Logger.getLogger( "" ).setLevel( Level.WARNING );
 		SpaceGame game = new SpaceGame();
-		game.setDialogBehaviour(SimpleGame.ALWAYS_SHOW_PROPS_DIALOG);
+		game.setConfigShowMode(ConfigShowMode.AlwaysShow);
 		game.start();
 	}
 
@@ -33,18 +32,19 @@ public class SpaceGame extends SimpleGame {
 		display.setTitle("SpaceGame");
 
 		//physics
-		//staticNode = getPhysicsSpace().createStaticNode();
-		//rootNode.attachChild(staticNode);
-		//dynamicNode = getPhysicsSpace().createDynamicNode();
-		//rootNode.attachChild(dynamicNode);
+		getPhysicsSpace().setDirectionalGravity(new Vector3f(0f, 0f, 0f));
+		staticNode = getPhysicsSpace().createStaticNode();
+		rootNode.attachChild(staticNode);
+		dynamicNode = getPhysicsSpace().createDynamicNode();
+		rootNode.attachChild(dynamicNode);
 
 		//environment
 		environment = new Environment();
 		rootNode.attachChild(environment);
-		
+
 		//light
 		//TODO
-		
+
 		//sphere
 		Sphere s = new Sphere("Sphere", 30, 30, 25);
 		s.setLocalTranslation(new Vector3f(0,0,-40));
@@ -52,14 +52,15 @@ public class SpaceGame extends SimpleGame {
 		s.updateModelBound();
 		Texture texture = TextureManager.loadTexture(
 				SpaceGame.class.getClassLoader().getResource(
-				"jmetest/data/images/Monkey.jpg"),
-				Texture.MinificationFilter.Trilinear,
-				Texture.MagnificationFilter.Bilinear);
+						"jmetest/data/images/Monkey.jpg"),
+		                Texture.MinificationFilter.BilinearNearestMipMap,
+		                Texture.MagnificationFilter.Bilinear);
 		TextureState ts = display.getRenderer().createTextureState();
 		ts.setEnabled(true);
 		ts.setTexture(texture);
 		s.setRenderState(ts);
-		rootNode.attachChild(s);
+		dynamicNode.attachChild(s);
+		
 	}
 
 	public void simpleUpdate(){
diff --git a/src/sg/env/Environment.java b/src/sg/env/Environment.java
index 54d7dd0..77039bc 100644
--- a/src/sg/env/Environment.java
+++ b/src/sg/env/Environment.java
@@ -8,6 +8,7 @@ import com.jme.scene.Skybox;
 import com.jme.util.TextureManager;
 
 public class Environment extends Node {
+	private static final long serialVersionUID = 1L;
 
 	public Environment(){
 		buildSkyBox();
@@ -18,39 +19,39 @@ public class Environment extends Node {
 		Texture north = TextureManager.loadTexture(
 				SpaceGame.class.getClassLoader().getResource(
 				"sg/data/skybox/advanced/front.png"),
-				Texture.MinificationFilter.BilinearNearestMipMap,
-				Texture.MagnificationFilter.Bilinear);
+                Texture.MinificationFilter.BilinearNearestMipMap,
+                Texture.MagnificationFilter.Bilinear);
 		Texture south = TextureManager.loadTexture(
 				SpaceGame.class.getClassLoader().getResource(
 				"sg/data/skybox/advanced/rest.png"),
-				Texture.MinificationFilter.BilinearNearestMipMap,
-				Texture.MagnificationFilter.Bilinear);
+                Texture.MinificationFilter.BilinearNearestMipMap,
+                Texture.MagnificationFilter.Bilinear);
 		Texture east = TextureManager.loadTexture(
 				SpaceGame.class.getClassLoader().getResource(
 				"sg/data/skybox/advanced/rest.png"),
-				Texture.MinificationFilter.BilinearNearestMipMap,
-				Texture.MagnificationFilter.Bilinear);
+                Texture.MinificationFilter.BilinearNearestMipMap,
+                Texture.MagnificationFilter.Bilinear);
 		Texture west = TextureManager.loadTexture(
 				SpaceGame.class.getClassLoader().getResource(
 				"sg/data/skybox/advanced/rest.png"),
-				Texture.MinificationFilter.BilinearNearestMipMap,
-				Texture.MagnificationFilter.Bilinear);
+                Texture.MinificationFilter.BilinearNearestMipMap,
+                Texture.MagnificationFilter.Bilinear);
 		Texture up = TextureManager.loadTexture(
 				SpaceGame.class.getClassLoader().getResource(
 				"sg/data/skybox/advanced/rest.png"),
-				Texture.MinificationFilter.BilinearNearestMipMap,
-				Texture.MagnificationFilter.Bilinear);
+                Texture.MinificationFilter.BilinearNearestMipMap,
+                Texture.MagnificationFilter.Bilinear);
 		Texture down = TextureManager.loadTexture(
 				SpaceGame.class.getClassLoader().getResource(
 				"sg/data/skybox/advanced/rest.png"),
-				Texture.MinificationFilter.BilinearNearestMipMap,
-				Texture.MagnificationFilter.Bilinear);
-		skybox.setTexture(Skybox.Face.North, north);
-		skybox.setTexture(Skybox.Face.West, west);
-		skybox.setTexture(Skybox.Face.South, south);
-		skybox.setTexture(Skybox.Face.East, east);
-		skybox.setTexture(Skybox.Face.Up, up);
-		skybox.setTexture(Skybox.Face.Down, down);
+                Texture.MinificationFilter.BilinearNearestMipMap,
+                Texture.MagnificationFilter.Bilinear);
+		skybox.setTexture(Skybox.NORTH, north);
+		skybox.setTexture(Skybox.WEST, west);
+		skybox.setTexture(Skybox.SOUTH, south);
+		skybox.setTexture(Skybox.EAST, east);
+		skybox.setTexture(Skybox.UP, up);
+		skybox.setTexture(Skybox.DOWN, down);
 		skybox.preloadTextures();
 		skybox.updateRenderState();
 		this.attachChild(skybox);
diff --git a/src/sg/test/PhysicsTest.java b/src/sg/test/PhysicsTest.java
index 0209fce..a6eee0b 100644
--- a/src/sg/test/PhysicsTest.java
+++ b/src/sg/test/PhysicsTest.java
@@ -3,6 +3,7 @@ package sg.test;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
+import com.jme.app.SimpleGame;
 import com.jmex.physics.DynamicPhysicsNode;
 import com.jmex.physics.StaticPhysicsNode;
 import com.jmex.physics.geometry.PhysicsBox;
@@ -25,6 +26,7 @@ public class PhysicsTest extends SimplePhysicsGame {
     public static void main( String[] args ) {
         Logger.getLogger( "" ).setLevel( Level.WARNING );
         PhysicsTest game = new PhysicsTest();
+        game.setConfigShowMode(ConfigShowMode.AlwaysShow);
         game.start();
     }
 }
\ No newline at end of file