lower agent height

Project/Assets/ML-Agents/Examples/Tennis/Scripts/TennisAgent.cs

         var moveY = Mathf.Clamp(vectorAction[1], -1f, 1f);
         var rotate = Mathf.Clamp(vectorAction[2], -1f, 1f) * m_InvertMult;
 
-        if (moveY > 0.0 && transform.position.y - transform.parent.transform.position.y < 5f)
+        if (moveY > 0.0 && transform.position.y - transform.parent.transform.position.y < -1.5f)
         {
             m_AgentRb.velocity = new Vector3(m_AgentRb.velocity.x, moveY * 20f, 0f);
         }

config/trainer_config.yaml

     batch_size: 2048
     buffer_size: 20480
     hidden_units: 256
-    beta: 3.0e-2
+    beta: 1.0e-2
     time_horizon: 1000
     self_play:
         window: 10