added gamescreen UI and simple start menu

Assets/Darkmatter/Code/Core/Contracts/Player/IPlayerAnim.cs

@@ -8,5 +8,6 @@ namespace Darkmatter.Core
         public void PlayMovementAnim(Vector2 velocity);
         public void PlayReloadAnim(IReloadableWeapon reloadableWeapon);
         void PlayShootAnim();
+        void PlayDeadAnim();
     }
 }

Assets/Darkmatter/Code/Core/Contracts/Player/IPlayerPawn.cs

@@ -2,7 +2,7 @@ using UnityEngine;
 
 namespace Darkmatter.Core
 {
-    public interface IPlayerPawn
+    public interface IPlayerPawn : IDamageable
     {
         bool isGrounded { get; }
 

Assets/Darkmatter/Code/Core/Contracts/Services/IInputReader.cs

@@ -11,5 +11,8 @@ namespace Darkmatter.Core
         public Vector2 moveInput { get; }
         public Vector2 lookInput { get; }
         public bool isShooting { get; }
+
+        public void DisableInput();
+        public void EnableInput();
     }
 }

Assets/Darkmatter/Code/Core/Contracts/UI.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: fb18939ec56040244812046623bfe046
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Darkmatter/Code/Core/Contracts/UI/IGameScreenController.cs

@@ -0,0 +1,14 @@
+using UnityEngine;
+
+namespace Darkmatter.Core
+{
+    public interface IGameScreenController
+    {
+
+        void UpdateFireableBulletCount(int bulletCount);
+        void UpdateRemainingZombiesCount(int zombiesCount);
+        void UpdateTotalZombiesCount(int totalZombiesCount);
+        void ShowGameOverText();
+        void ShowPlayerHealth(int health);
+    }
+}

Assets/Darkmatter/Code/Core/Contracts/UI/IGameScreenController.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: e6871718dd9c3244eac4e4eed90a289f