Make player dash with 'down' key

Assets/Scripts/PlayerControl.cs

@@ -11,6 +11,8 @@ public class PlayerControl : MonoBehaviour
     public float groundDamping = 20f; // how fast do we change direction? higher means faster
     public float inAirDamping = 5f;
     public float targetJumpHeight = 2f;
+    public bool canDash = true;
+    public float dashCoolDown = 0.25f;
     // public float jumpWaitTime = 2.0;
 
     [HideInInspector]
@@ -25,7 +27,7 @@ public class PlayerControl : MonoBehaviour
     public Vector3 velocity;
 
     public int playerNumber = 1; //gibt an, ob es sich um player one, player two, etc. handelt. sollte nicht 0 sein;
-    KeyCode goRightKeyCode, goLeftKeyCode, jumpKeyCode;
+    KeyCode goRightKeyCode, goLeftKeyCode, jumpKeyCode, dashKeyCode;
 
     void Start()
     {
@@ -35,10 +37,10 @@ public class PlayerControl : MonoBehaviour
         switch (playerNumber)
         {
             case 1:
-               setKeyCodes(KeyCode.D,KeyCode.A,KeyCode.W);
+               setKeyCodes(KeyCode.D, KeyCode.A, KeyCode.W, KeyCode.S);
                 break;
             case 2:
-                setKeyCodes(KeyCode.RightArrow, KeyCode.LeftArrow, KeyCode.UpArrow);
+                setKeyCodes(KeyCode.RightArrow, KeyCode.LeftArrow, KeyCode.UpArrow, KeyCode.DownArrow);
                 break;
                 //TODO player 3 and 4
             default:
@@ -46,11 +48,12 @@ public class PlayerControl : MonoBehaviour
         }
     }
 
-    private void setKeyCodes(KeyCode right, KeyCode left, KeyCode up)
+    private void setKeyCodes(KeyCode right, KeyCode left, KeyCode up, KeyCode dash)
     {
         goRightKeyCode = right;
         goLeftKeyCode = left;
         jumpKeyCode = up;
+        dashKeyCode = dash;
     }
 
 
@@ -97,6 +100,19 @@ public class PlayerControl : MonoBehaviour
             //if (_controller.isGrounded)
         }
 
+        if (canDash && Input.GetKey (dashKeyCode))
+        {
+            float direction = Mathf.Sign (transform.localScale.x);
+            if (normalizedHorizontalSpeed != 0)
+            {
+                // player pressed a movement button so prefer the new direction
+                direction = Mathf.Sign (normalizedHorizontalSpeed);
+            }
+
+            normalizedHorizontalSpeed = 5 * direction;
+            canDash = false;
+            Invoke("EnableDash", dashCoolDown);
+        }
 
         if (Input.GetKeyDown(jumpKeyCode))
         {
@@ -119,4 +135,8 @@ public class PlayerControl : MonoBehaviour
 
     }
 
-}
+    void EnableDash()
\ No newline at end of file
+    {
+        canDash = true;
+    }
+}