modifs mineures ajustements

Assets/Scripts/GameManager.cs

@@ -123,7 +123,7 @@ public class GameManager : MonoBehaviour
     {
         while (true)
         {
-            AddMana(4.3f-Mathf.Log(LifeScript.TreeCount()));
+            AddMana(Mathf.Max(4.3f-Mathf.Log(LifeScript.TreeCount()),0f));
             yield return new WaitForSeconds(0.5f);
         }
     }