diff --git a/README.md b/README.md
index 1fd6bf2..76dde4b 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 A turn based game in which players kill each others using bows, arrows and GRAVITY !
 
 ## Built with
-* [openJDK 15](https://openjdk.java.net/projects/jdk/15/)
+* [openJDK 8](https://openjdk.java.net/projects/jdk/8/)
 * [libGDX](https://libgdx.com/)
 
 ## Usage
@@ -26,14 +26,16 @@ To export the game to a .jar file:
 The resulting .jar file should be in `desktop/build/libs/`
 
 ## TODO LIST
-* create BaseActor to concatenate code
-* player turn
-* kill player
+* generate random map (with parameters)
 * move freely camera
-* lerp camera arrow
-* menus test
+* faire des textures (+ background)
+* particules de flèche, quand un joueur meurt...
+* faire le gestionnaire de keybinds
+* faire des sons et musique
+* astéroïdes
+* bonus/gadgets
 * améliorer trajectoires arrows en simulant tout n'univers
-* rotating planets and moons (on themselves)
+* petites phrases vision
 
 ## Contributing
 Please use [conventionnal commits](https://www.conventionalcommits.org/).
diff --git a/core/src/sagittarius/model/Arrow.java b/core/src/sagittarius/model/Arrow.java
index f0e6711..eb8a7c7 100644
--- a/core/src/sagittarius/model/Arrow.java
+++ b/core/src/sagittarius/model/Arrow.java
@@ -146,7 +146,7 @@ public class Arrow extends EntityQuad {
     private void verifyHitting() {
         for (Actor actor : GameScreen.players.getChildren()) {
             Player player = (Player) actor;
-            if (player == GameScreen.playerCurrent && TTL > 19.5) break;
+            if (player == GameScreen.playerCurrent && TTL > 19.5) continue;
             if (Intersector.overlapConvexPolygons(player.hitbox, this.hitbox)) {
                 landed = true;
                 GameScreen.removePlayer(player);
@@ -158,10 +158,11 @@ public class Arrow extends EntityQuad {
         }
     }
 
-    private boolean hasHit() {
+    private boolean hasHit() { // doesn't work
         for (Actor actor : GameScreen.players.getChildren()) {
             Player player = (Player) actor;
-            if (TTL < 19 && Intersector.overlapConvexPolygons(player.hitbox, this.hitbox)) {
+            if (player == GameScreen.playerCurrent) continue;
+            if (player.hitbox.contains(this.getPosition())) {
                 return true;
             }
         }
@@ -181,16 +182,16 @@ public class Arrow extends EntityQuad {
         Arrow dummyArrow = new Arrow(angle, power, shooter);
         for (int i = 0; i < iterations; i++) {
             dummyArrow.integrationVerlet(timeStep);
-            if (dummyArrow.hasLanded() || dummyArrow.hasHit() ) { break; }
             path.add(dummyArrow.getX());
             path.add(dummyArrow.getY());
+            if ( dummyArrow.hasLanded() || dummyArrow.hasHit() ) { break; }
         }
 
         // TODO : optimize, lots of useless stuff + change name
         // or ignore and use adapters
 
         final float[] arr = new float[path.size()]; // utiliser le count de la fonction, faire tab size iteration*2, et draw avec count
-        int index = 0;
+        int index = 0;                              // TODO: créer objet Trajectory, avec un float[iteration*2] et un actualSize;
         for (final Float value: path) {
            arr[index++] = value;
         }
diff --git a/core/src/sagittarius/model/Bow.java b/core/src/sagittarius/model/Bow.java
index 82cb030..cd41593 100644
--- a/core/src/sagittarius/model/Bow.java
+++ b/core/src/sagittarius/model/Bow.java
@@ -60,7 +60,7 @@ public class Bow extends Actor {
             if (power > 50) shapes.setColor(Color.RED);
             shapes.line(this.anchor, GameScreen.worldCursor);
             if (aimAssist) {
-                float[] traj = Arrow.traj(angle, power, GameScreen.playerCurrent, 400, 0.05f);
+                float[] traj = Arrow.traj(angle, power, GameScreen.playerCurrent, 500, 0.03f);
                 if (traj.length > 2) {
                     shapes.polyline(traj);
                 }
diff --git a/core/src/sagittarius/view/GameScreen.java b/core/src/sagittarius/view/GameScreen.java
index 0b99dd5..1da58eb 100644
--- a/core/src/sagittarius/view/GameScreen.java
+++ b/core/src/sagittarius/view/GameScreen.java
@@ -1,10 +1,12 @@
 package sagittarius.view;
 
 import com.badlogic.gdx.Gdx;
-import com.badlogic.gdx.Input.Buttons;
+import com.badlogic.gdx.InputProcessor;
+import com.badlogic.gdx.Input.Keys;
 import com.badlogic.gdx.graphics.Color;
 import com.badlogic.gdx.graphics.OrthographicCamera;
 import com.badlogic.gdx.graphics.g2d.BitmapFont;
+import com.badlogic.gdx.math.MathUtils;
 import com.badlogic.gdx.math.Vector2;
 import com.badlogic.gdx.math.Vector3;
 import com.badlogic.gdx.scenes.scene2d.Group;
@@ -12,7 +14,7 @@ import com.badlogic.gdx.scenes.scene2d.Group;
 import sagittarius.SagittariusGame;
 import sagittarius.model.*;
 
-public class GameScreen extends BaseScreen {
+public class GameScreen extends BaseScreen implements InputProcessor {
 
 // ---------- ATTRIBUTEs ----------
 
@@ -38,12 +40,15 @@ public class GameScreen extends BaseScreen {
     private final float ispeed = 1.0f - speed;
     private static Entity focus;
 
+    // test
+    private OrthographicCamera gameCam;
+
 // ---------- METHODs ----------
 
     @Override
     public void initialize() {
 
-        Gdx.input.setInputProcessor(null); // on a pas de boutons
+        Gdx.input.setInputProcessor(this);
 
         // planets & moons
         attractors = new Group();
@@ -102,6 +107,7 @@ public class GameScreen extends BaseScreen {
         // camera stuff
         mainCameraPosition = mainStage.getCamera().position;
         focus = playerCurrent;
+        gameCam = ((OrthographicCamera) mainStage.getCamera());
 
     }
 
@@ -116,16 +122,21 @@ public class GameScreen extends BaseScreen {
             SagittariusGame.setActiveScreen( new StartScreen() );
         }
 
+        // camera zoom using keys
+        if (Gdx.input.isKeyPressed( Keys.DOWN)) {
+            gameCam.zoom += dt;
+        }
+        if (Gdx.input.isKeyPressed( Keys.UP)) {
+            gameCam.zoom -= dt;
+        }
+
+        // clamp zoom 
+        gameCam.zoom = MathUtils.clamp(gameCam.zoom, 1f, 3f);
+
         // camera follow focus
         mainCameraPosition.scl(ispeed);
         mainCameraPosition.add(new Vector3(focus.getPosition(), 0).scl(speed));
 
-        if (Gdx.input.isButtonPressed(Buttons.LEFT)) {
-            ((OrthographicCamera) mainStage.getCamera()).zoom = 2f;
-        } else {
-            ((OrthographicCamera) mainStage.getCamera()).zoom = 1f;
-        }
-
     }
 
     /**
@@ -164,4 +175,55 @@ public class GameScreen extends BaseScreen {
     public static void setFocus(Entity entity) {
         focus = entity;
     }
-}
\ No newline at end of file
+
+// ---------- InputProcessor METHODs ----------
+
+    @Override
+    public boolean keyDown(int keycode) {
+        // TODO Auto-generated method stub
+        return true;
+    }
+
+    @Override
+    public boolean keyUp(int keycode) {
+        // TODO Auto-generated method stub
+        return true;
+    }
+
+    @Override
+    public boolean keyTyped(char character) {
+        // TODO Auto-generated method stub
+        return true;
+    }
+
+    @Override
+    public boolean touchDown(int screenX, int screenY, int pointer, int button) {
+        // TODO Auto-generated method stub
+        return false;
+    }
+
+    @Override
+    public boolean touchUp(int screenX, int screenY, int pointer, int button) {
+        // TODO Auto-generated method stub
+        return false;
+    }
+
+    @Override
+    public boolean touchDragged(int screenX, int screenY, int pointer) {
+        // TODO Auto-generated method stub
+        return false;
+    }
+
+    @Override
+    public boolean mouseMoved(int screenX, int screenY) {
+        // TODO Auto-generated method stub
+        return false;
+    }
+
+    @Override
+    public boolean scrolled(float amountX, float amountY) {
+        gameCam.zoom += 2 * amountY * Gdx.graphics.getDeltaTime();
+        return false;
+    }
+
+}