diff --git a/.legend b/.legend
new file mode 100644
index 0000000..1930fef
--- /dev/null
+++ b/.legend
@@ -0,0 +1,96 @@
+The map is an xml.
+
+You have prefabs or complete scenes.
+
+A scene must have the tag <gc_scene> and should contains a <data> tag with every
+static data to load with the scene (for the sfml, you have the <sprite>, <font>
+and <music> tags).
+
+A scene or a prefab may have a <gc_entities> tag listing every entity that needs
+to be created.
+
+To define an entity, use the tag <gc_entity> and put components 
+inside the entity.
+
+
+Valid components and there properties are:
+
+    transform_component: allow the entity to be placed on the map.
+        -> Position: x, y - set the position of the entity
+        -> Size:     x, y - set the size of an entity.
+
+    renderer: draw the entity on the screen
+        -> src: give the path of the sprite to use 
+            (should already be in the data of the scene)
+            -> rect (child): height, width, top, left - Use an offset of the 
+                texture and not the whole texture.
+            -> animation: add an animation to the animation manager 
+                of this entity
+                -> name: The name it is refered as
+                -> frame_count: the number of frame the animation has
+                -> frame_rate: the number of frame to show per second
+                -> rect (child): change the start offset/size of the texture
+        -> text: draw the inputed text on the screen instead of a texture
+
+    fixed_to_cam: make the entity follow the camera
+        -> offset: set the position of the entity on the screen 
+            (will be kept when the camera moves)
+
+    parallax_component: make the texture of this entity move with it's movements
+        -> speed: apply a speed multiplier to the parallax.
+
+    collision_component: provide collsisions
+        -> layer: select witch layer the entity collide with and wich layer may
+            see this entity.
+
+    friction_giver: apply frictions to the entities that can have frictions when
+        theses entities are on contact with this one.
+        -> value: the ammount of friction to give
+
+    friction_component: allow this entity to have friction
+        -> value: the ammount of friction that the air give to this entity
+
+    movable_component: allow the entity to move or be moved 
+        (is subject to acceleration and so on)
+
+    controllable_component: tells that this entity may have inputs 
+        (AI, Keyboard, Network...)
+
+    keyboard_controller: allow this entity to be controlled by the keyboard
+        -> left: left moving key id
+        -> right: right moving key id
+        -> jump: jump moving key id.
+        PS: ids should confort with your rendering engine. 
+            For the sfml, use sfml bindings.
+
+    gravity_component: make this entity be subject to the gravity
+        -> force: the force of the gravity
+
+    walk_action: allow this entity to walk using left and right values 
+        of the controllable_component
+        -> acceleration: the acceleration of the walk
+        -> idle_trigger: at witch speed should the iddle animation be triggered
+
+    jump_action: allow this entity to jump using the jump value 
+        of the controllable_component
+        -> acceleration: the force of the acceleration
+        -> step_count: the number of frame to apply the jump force
+        -> conterforce: the ammount of force pointed downward to apply to 
+            the entity when the jump is canceled before the end
+
+    live_component: allow this entity to reswpan and listen to win/kill actions
+        -> count: the number of lives (0 or negative for infinite)
+
+    win_component: trigger the win event when an entity with the live_component 
+        make contact with this entity
+
+    kill_component: make an entity that touch this one respawn if it has 
+        the live_component.
+
+    timer_component: update the renderer text to the time left 
+        and kill all entities with the live_component when the timer comes to 0.
+        -> time: the number of seconds for this timer.
+
+    camerafollow_component: make the camera follow this entity
+        PS: if multiple entities have this component, the camera will center
+            arround these entities. (warning: the camera doesn't zoom for now)
\ No newline at end of file
diff --git a/main.c b/main.c
index 1625ad0..2f0c203 100644
--- a/main.c
+++ b/main.c
@@ -8,10 +8,12 @@
 #include "runner.h"
 #include "my.h"
 
-int usage(void)
+int usage(const char *bin)
 {
     my_printf("My runner:\n\n\tUsage: %s [path_to_map]. \
-If no map are specified, the default one is loaded.\n");
+If no map are specified, the default one is loaded.\n\n\
+Moves:\n\tQ or D to move to the left or right\n\t\
+SPACE to jump\n", bin);
     return (0);
 }
 
@@ -20,6 +22,6 @@ int main(int argc, char **argv)
     if (argc == 1)
         return (start_game("prefabs/game.gcprefab"));
     if (argc != 2 || !my_strcmp(argv[1], "-h"))
-        return (usage());
+        return (usage(argv[0]));
     return (start_game(argv[1]));
 }
\ No newline at end of file
diff --git a/prefabs/game.gcprefab b/prefabs/game.gcprefab
index c7930f0..044a93e 100644
--- a/prefabs/game.gcprefab
+++ b/prefabs/game.gcprefab
@@ -59,7 +59,7 @@
             <transform_component />
             <renderer text="" />
             <fixed_to_cam />
-            <timer_component time="60"/>
+            <timer_component time="10"/>
         </gc_entity>
 
         <gc_entity>