Implmenent PlayerUpgrade singleton

Assets/DevMocks/FlameUpgrade.prefab

@@ -11,6 +11,7 @@ GameObject:
   - component: {fileID: 685382037628668327}
   - component: {fileID: 7037551310800415105}
   - component: {fileID: 7958292204112110464}
+  - component: {fileID: 5334633105760309190}
   m_Layer: 0
   m_Name: FlameUpgrade
   m_TagString: Untagged
@@ -106,3 +107,15 @@ BoxCollider2D:
   serializedVersion: 2
   m_Size: {x: 1, y: 1}
   m_EdgeRadius: 0
+--- !u!114 &5334633105760309190
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 7385886653159515755}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: 94153367f2364ab38597c8f4a6521909, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 

Assets/DevMocks/SpeedUpgrade.prefab

@@ -11,6 +11,7 @@ GameObject:
   - component: {fileID: 5958400204756161002}
   - component: {fileID: 7382262205660184478}
   - component: {fileID: 2747432428292150867}
+  - component: {fileID: 6291791717356696744}
   m_Layer: 0
   m_Name: SpeedUpgrade
   m_TagString: Untagged
@@ -106,3 +107,15 @@ BoxCollider2D:
   serializedVersion: 2
   m_Size: {x: 1, y: 1}
   m_EdgeRadius: 0
+--- !u!114 &6291791717356696744
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 4242909486338491383}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: 0b8c723aa8c7476789cbee67fcadfbef, type: 3}
+  m_Name: 
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Assets/Scripts/src/Player/PlayerController.cs

@@ -11,6 +11,7 @@ namespace src.Player
         private Transform _respawnPosition;
         private BombsSpawner _bombsSpawner;
         private Animator _animator;
+        private PlayerUpgrade _playerUpgrade;
         private static readonly int AnimHorizontal = Animator.StringToHash("AnimHorizontal");
         private static readonly int AnimVertical = Animator.StringToHash("AnimVertical");
 
@@ -21,6 +22,12 @@ namespace src.Player
             _respawnPosition = GameObject.Find("RespawnPosition").transform;
             _bombsSpawner = GameObject.Find("BombSpawner").GetComponent<BombsSpawner>();
             _animator = GetComponentInChildren<Animator>();
+            _playerUpgrade = PlayerUpgrade.Instance;
+
+            movementSpeed = _playerUpgrade.GetMovementSpeed();
+            _playerUpgrade.PlayerSpeed += IncreaseSpeed;
+
+
             /* Always start at the starting point. */
             Respawn();
         }

Assets/Scripts/src/Player/PlayerUpgrade.cs

@@ -0,0 +1,31 @@
+namespace src.Player
+{
+    public class PlayerUpgrade
+    {
+        public delegate void IncreaseSpeedDelegate(float speed);
+        public static PlayerUpgrade Instance = new PlayerUpgrade();
+        public event IncreaseSpeedDelegate PlayerSpeed;
+        public const float MaxPlayerSpeed = 8f;
+        private float _movementSpeed = 4f;
+
+        private PlayerUpgrade()
+        {
+            
+        }
+
+        public float GetMovementSpeed()
+        {
+            return _movementSpeed;
+        }
+        
+        public void IncreaseSpeed(float speed)
+        {
+            if (_movementSpeed >= MaxPlayerSpeed)
+            {
+                return;
+            }
+            _movementSpeed += speed;
+            PlayerSpeed.Invoke(speed);
+        }
+    }
+}

Assets/Scripts/src/Player/PlayerUpgrade.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: f43c74f0122b4324bb89907975813ddb
+timeCreated: 1561488128

Assets/Scripts/src/Upgrade/PlayerSpeedUpgrade.cs

@@ -1,5 +1,4 @@
 using src.Player;
-using UnityEngine;
 
 namespace src.Upgrade
 {
@@ -7,8 +6,7 @@ namespace src.Upgrade
     {
         public override void PerformUpgrade()
         {
-            /* TODO: Refactor to use a player manager. */
+            var player = PlayerUpgrade.Instance;
-            var player = GameObject.Find("Player").GetComponent<PlayerController>();
             player.IncreaseSpeed(.5f);
         }
     }