diff --git a/Build/Makefile.mk b/Build/Makefile.mk
index 643f4a6c..52d57e23 100644
--- a/Build/Makefile.mk
+++ b/Build/Makefile.mk
@@ -19,8 +19,8 @@ else ifeq ($(PLATFORM), IMac)
 else ifeq ($(PLATFORM), IOs)
     
 else ifeq ($(PLATFORM), Android)
-    PROJECT_NDK?=$(realpath $(PROJECT_MODULE)/android/ndk/)
-    PROJECT_SDK?=$(realpath $(PROJECT_MODULE)/android/sdk/)
+    PROJECT_NDK:=$(PROJECT_MODULE)/android/ndk/
+    PROJECT_SDK:=$(PROJECT_MODULE)/android/sdk/
 else
     $(error you must specify a corect platform : make PLATFORM=$(SUPPORTED_PLATFORM))
 endif
diff --git a/Java/ewolAndroidAbstraction.cpp b/Java/ewolAndroidAbstraction.cpp
index 14aeb478..b399e57e 100644
--- a/Java/ewolAndroidAbstraction.cpp
+++ b/Java/ewolAndroidAbstraction.cpp
@@ -27,7 +27,7 @@
 #include <time.h>
 #include <stdint.h>
 #include <pthread.h>
-#include <tools_debug.h>
+#include <Debug.h>
 
 #include <ewol/threadMsg.h>
 
@@ -57,49 +57,49 @@ extern "C"
 	
 	void Java_com___PROJECT_VENDOR_____PROJECT_PACKAGE_____PROJECT_NAME___ActivityOnCreate( JNIEnv*  env )
 	{
-		EDN_DEBUG("*******************************************");
-		EDN_DEBUG("**  Activity On Create                   **");
-		EDN_DEBUG("*******************************************");
+		APPL_DEBUG("*******************************************");
+		APPL_DEBUG("**  Activity On Create                   **");
+		APPL_DEBUG("*******************************************");
 		EWOL_SystemStart();
 	}
 	void Java_com___PROJECT_VENDOR_____PROJECT_PACKAGE_____PROJECT_NAME___ActivityOnStart( JNIEnv*  env )
 	{
-		EDN_DEBUG("*******************************************");
-		EDN_DEBUG("**  Activity On Start                    **");
-		EDN_DEBUG("*******************************************");
+		APPL_DEBUG("*******************************************");
+		APPL_DEBUG("**  Activity On Start                    **");
+		APPL_DEBUG("*******************************************");
 	}
 	void Java_com___PROJECT_VENDOR_____PROJECT_PACKAGE_____PROJECT_NAME___ActivityOnReStart( JNIEnv*  env )
 	{
-		EDN_DEBUG("*******************************************");
-		EDN_DEBUG("**  Activity On Re-Start                 **");
-		EDN_DEBUG("*******************************************");
+		APPL_DEBUG("*******************************************");
+		APPL_DEBUG("**  Activity On Re-Start                 **");
+		APPL_DEBUG("*******************************************");
 	}
 	void Java_com___PROJECT_VENDOR_____PROJECT_PACKAGE_____PROJECT_NAME___ActivityOnResume( JNIEnv*  env )
 	{
-		EDN_DEBUG("*******************************************");
-		EDN_DEBUG("**  Activity On Resume                   **");
-		EDN_DEBUG("*******************************************");
+		APPL_DEBUG("*******************************************");
+		APPL_DEBUG("**  Activity On Resume                   **");
+		APPL_DEBUG("*******************************************");
 	}
 	void Java_com___PROJECT_VENDOR_____PROJECT_PACKAGE_____PROJECT_NAME___ActivityOnPause( JNIEnv*  env )
 	{
-		EDN_DEBUG("*******************************************");
-		EDN_DEBUG("**  Activity On Pause                    **");
-		EDN_DEBUG("*******************************************");
+		APPL_DEBUG("*******************************************");
+		APPL_DEBUG("**  Activity On Pause                    **");
+		APPL_DEBUG("*******************************************");
 		// All the openGl has been destroyed ...
 		// TODO : Mark all the texture to be reloaded ...
 		EWOL_NativeGLDestroy();
 	}
 	void Java_com___PROJECT_VENDOR_____PROJECT_PACKAGE_____PROJECT_NAME___ActivityOnStop( JNIEnv*  env )
 	{
-		EDN_DEBUG("*******************************************");
-		EDN_DEBUG("**  Activity On Stop                     **");
-		EDN_DEBUG("*******************************************");
+		APPL_DEBUG("*******************************************");
+		APPL_DEBUG("**  Activity On Stop                     **");
+		APPL_DEBUG("*******************************************");
 	}
 	void Java_com___PROJECT_VENDOR_____PROJECT_PACKAGE_____PROJECT_NAME___ActivityOnDestroy( JNIEnv*  env )
 	{
-		EDN_DEBUG("*******************************************");
-		EDN_DEBUG("**  Activity On Destroy                  **");
-		EDN_DEBUG("*******************************************");
+		APPL_DEBUG("*******************************************");
+		APPL_DEBUG("**  Activity On Destroy                  **");
+		APPL_DEBUG("*******************************************");
 		EWOL_SystemStop();
 	}
 	
diff --git a/Sources/libetk/etk/DebugInternal.cpp b/Sources/libetk/etk/DebugInternal.cpp
index 8e1b9a03..b7894836 100644
--- a/Sources/libetk/etk/DebugInternal.cpp
+++ b/Sources/libetk/etk/DebugInternal.cpp
@@ -22,4 +22,4 @@
  *******************************************************************************
  */
 
-const char * etkLibName = "Etk     ";
+const char * etkLibName = "Etk      ";
diff --git a/Sources/libewol/ewol/Debug.cpp b/Sources/libewol/ewol/Debug.cpp
index 49ac7926..7225a70a 100644
--- a/Sources/libewol/ewol/Debug.cpp
+++ b/Sources/libewol/ewol/Debug.cpp
@@ -25,4 +25,4 @@
 
 #include <ewol/Debug.h>
 
-const char * ewolLibName = "ewol    ";
+const char * ewolLibName = "ewol     ";
diff --git a/Sources/libewol/ewol/Game/GameElement.cpp b/Sources/libewol/ewol/Game/GameElement.cpp
index 04a58b51..8ed198c7 100644
--- a/Sources/libewol/ewol/Game/GameElement.cpp
+++ b/Sources/libewol/ewol/Game/GameElement.cpp
@@ -36,10 +36,11 @@ ewol::GameElement::GameElement(void)
 	m_visible = true;
 	m_position.x = 0.0;
 	m_position.y = 0.0;
-	m_acceleration.x = 0.0;
-	m_acceleration.y = 0.0;
+	m_speed.x = 0.0;
+	m_speed.y = 0.0;
 	m_size = 64.0;
 	m_angle = 0.0;
+	m_gravity = 0.0;
 }
 
 
diff --git a/Sources/libewol/ewol/Game/GameElement.h b/Sources/libewol/ewol/Game/GameElement.h
index ed5e2732..1dd912ac 100644
--- a/Sources/libewol/ewol/Game/GameElement.h
+++ b/Sources/libewol/ewol/Game/GameElement.h
@@ -37,9 +37,10 @@ namespace ewol {
 		protected:
 			bool       m_visible;
 			coord2D_ts m_position;
-			coord2D_ts m_acceleration;
+			coord2D_ts m_speed;
 			etkFloat_t m_size;
 			etkFloat_t m_angle;
+			etkFloat_t m_gravity;
 		public:
 			                    GameElement(void);
 			virtual             ~GameElement(void);
@@ -48,15 +49,20 @@ namespace ewol {
 			        coord2D_ts  PositionGet(void)                              { return m_position; };
 			        void        PositionSet(coord2D_ts state)                  { m_position = state; };
 			        void        PositionSet(etkFloat_t xxx, etkFloat_t yyy)    { m_position.x = xxx; m_position.y = yyy; };
-			        coord2D_ts  AccelerationGet(void)                          { return m_acceleration; };
-			        void        AccelerationSet(coord2D_ts state)              { m_acceleration = state; };
+			        coord2D_ts  SpeedGet(void)                                 { return m_speed; };
+			        void        SpeedSet(coord2D_ts state)                     { m_speed = state; };
+			        void        SpeedSet(etkFloat_t xxx, etkFloat_t yyy)       { m_speed.x = xxx; m_speed.y = yyy; };
 			        etkFloat_t  SizeGet(void)                                  { return m_size; };
 			        void        SizeSet(etkFloat_t state)                      { m_size = state; };
 			        etkFloat_t  AngleGet(void)                                 { return m_angle; };
 			        void        AngleSet(etkFloat_t state)                     { m_angle = state; };
+			        etkFloat_t  GravityGet(void)                               { return m_gravity; };
+			        void        GravitySet(etkFloat_t state)                   { m_gravity = state; };
 			virtual bool        Process(int64_t time, int32_t deltaTime, etk::VectorType<ewol::GameElement*> & listOfElement);
 			virtual void        Draw(etk::VectorType<ewol::Sprite*> & listOfSprite, etk::VectorType<ewol::Sprite*> & listOfEffects);
 			virtual void        RemoveElement(int32_t idOfElement);
+			virtual bool        HaveImpact(int32_t type, coord2D_ts position, etkFloat_t size) {return false;};
+			virtual void        Explosion(int32_t type, coord2D_ts position, etkFloat_t pxAtenuation, etkFloat_t power) { } ;
 					int32_t     LoadSprite(etk::VectorType<ewol::Sprite*> listOfElement[NB_BOUBLE_BUFFER], etk::UString fileName, coord2D_ts maxSize);
 	};
 	
diff --git a/Sources/libewol/ewol/widget/Button.cpp b/Sources/libewol/ewol/widget/Button.cpp
index 4c75bfa0..84e62028 100644
--- a/Sources/libewol/ewol/widget/Button.cpp
+++ b/Sources/libewol/ewol/widget/Button.cpp
@@ -28,9 +28,11 @@
 #include <ewol/WidgetManager.h>
 
 
-extern const char * const ewolEventButtonPressed    = "ewol Button Pressed";
-extern const char * const ewolEventButtonEnter      = "ewol Button Enter";
-extern const char * const ewolEventButtonLeave      = "ewol Button Leave";
+extern const char * const ewolEventButtonPressed    = "ewol-button-Pressed";
+extern const char * const ewolEventButtonDown       = "ewol-button-down";
+extern const char * const ewolEventButtonUp         = "ewol-button-up";
+extern const char * const ewolEventButtonEnter      = "ewol-button-enter";
+extern const char * const ewolEventButtonLeave      = "ewol-button-leave";
 
 
 /**
@@ -51,6 +53,8 @@ void ewol::WIDGET_ButtonInit(void)
 void ewol::Button::Init(void)
 {
 	AddEventId(ewolEventButtonPressed);
+	AddEventId(ewolEventButtonDown);
+	AddEventId(ewolEventButtonUp);
 	AddEventId(ewolEventButtonEnter);
 	AddEventId(ewolEventButtonLeave);
 	m_hasAnImage = false;
@@ -277,11 +281,15 @@ bool ewol::Button::OnEventInput(int32_t IdInput, eventInputType_te typeEvent, co
 {
 	//EWOL_DEBUG("Event on BT ...");
 	if (1 == IdInput) {
+		if(ewol::EVENT_INPUT_TYPE_DOWN == typeEvent) {
+			GenerateEventId(ewolEventButtonDown);
+		}
+		if(ewol::EVENT_INPUT_TYPE_UP == typeEvent) {
+			GenerateEventId(ewolEventButtonUp);
+		}
 		if(    ewol::EVENT_INPUT_TYPE_SINGLE == typeEvent
 		    || ewol::EVENT_INPUT_TYPE_DOUBLE == typeEvent
 		    || ewol::EVENT_INPUT_TYPE_TRIPLE == typeEvent) {
-			// nothing to do ...
-			//EWOL_DEBUG("    ==> generate event : " << ewolEventButtonPressed);
 			GenerateEventId(ewolEventButtonPressed);
 			MarkToReedraw();
 			return true;
diff --git a/Sources/libewol/ewol/widget/Button.h b/Sources/libewol/ewol/widget/Button.h
index 793f4273..b6eb3ed7 100644
--- a/Sources/libewol/ewol/widget/Button.h
+++ b/Sources/libewol/ewol/widget/Button.h
@@ -30,6 +30,8 @@
 #include <ewol/widget/Drawable.h>
 
 extern const char * const ewolEventButtonPressed;
+extern const char * const ewolEventButtonDown;
+extern const char * const ewolEventButtonUp;
 extern const char * const ewolEventButtonEnter;
 extern const char * const ewolEventButtonLeave;
 
diff --git a/Sources/libewol/ewol/widget/Scene.cpp b/Sources/libewol/ewol/widget/Scene.cpp
index 5ac05ef0..5c374299 100644
--- a/Sources/libewol/ewol/widget/Scene.cpp
+++ b/Sources/libewol/ewol/widget/Scene.cpp
@@ -167,11 +167,15 @@ void ewol::Scene::AddElement(ewol::GameElement* newElement)
  */
 void ewol::Scene::PeriodicCall(int64_t localTime)
 {
+	
 	//EWOL_ERROR("Periodic Call ... " << localTime);
 	for (int32_t iii=0; iii<m_listAnimatedElements.Size(); iii++) {
 		if (NULL != m_listAnimatedElements[iii]) {
-			// find an empty slot ...
-			m_listAnimatedElements[iii]->Process(localTime, 100, m_listAnimatedElements);
+			// check if the element request an auto Kill ...
+			if (true == m_listAnimatedElements[iii]->Process(localTime, 20000, m_listAnimatedElements) ) {
+				delete(m_listAnimatedElements[iii]);
+				m_listAnimatedElements[iii] = NULL;
+			}
 		}
 	}
 	MarkToReedraw();
diff --git a/Sources/libparsersvg/parserSVG/Debug.cpp b/Sources/libparsersvg/parserSVG/Debug.cpp
index 0beef09f..2c7b9c14 100644
--- a/Sources/libparsersvg/parserSVG/Debug.cpp
+++ b/Sources/libparsersvg/parserSVG/Debug.cpp
@@ -24,4 +24,4 @@
 
 #include <parserSVG/Debug.h>
 
-const char * parserSVGLibName = "parserSVG ";
+const char * parserSVGLibName = "parserSVG";