Removing the douplicate camera from the scene.

Assets/Scenes/SampleScene.unity

@@ -519,98 +519,6 @@ PrefabInstance:
     m_AddedGameObjects: []
     m_AddedComponents: []
   m_SourcePrefab: {fileID: 3150474306388093854, guid: 243332bb75927ad4ab1162718e63a3c0, type: 3}
---- !u!1 &963194225
-GameObject:
-  m_ObjectHideFlags: 0
-  m_CorrespondingSourceObject: {fileID: 0}
-  m_PrefabInstance: {fileID: 0}
-  m_PrefabAsset: {fileID: 0}
-  serializedVersion: 6
-  m_Component:
-  - component: {fileID: 963194228}
-  - component: {fileID: 963194227}
-  - component: {fileID: 963194226}
-  m_Layer: 0
-  m_Name: Main Camera
-  m_TagString: MainCamera
-  m_Icon: {fileID: 0}
-  m_NavMeshLayer: 0
-  m_StaticEditorFlags: 0
-  m_IsActive: 1
---- !u!81 &963194226
-AudioListener:
-  m_ObjectHideFlags: 0
-  m_CorrespondingSourceObject: {fileID: 0}
-  m_PrefabInstance: {fileID: 0}
-  m_PrefabAsset: {fileID: 0}
-  m_GameObject: {fileID: 963194225}
-  m_Enabled: 1
---- !u!20 &963194227
-Camera:
-  m_ObjectHideFlags: 0
-  m_CorrespondingSourceObject: {fileID: 0}
-  m_PrefabInstance: {fileID: 0}
-  m_PrefabAsset: {fileID: 0}
-  m_GameObject: {fileID: 963194225}
-  m_Enabled: 1
-  serializedVersion: 2
-  m_ClearFlags: 1
-  m_BackGroundColor: {r: 0.19215687, g: 0.3019608, b: 0.4745098, a: 0}
-  m_projectionMatrixMode: 1
-  m_GateFitMode: 2
-  m_FOVAxisMode: 0
-  m_Iso: 200
-  m_ShutterSpeed: 0.005
-  m_Aperture: 16
-  m_FocusDistance: 10
-  m_FocalLength: 50
-  m_BladeCount: 5
-  m_Curvature: {x: 2, y: 11}
-  m_BarrelClipping: 0.25
-  m_Anamorphism: 0
-  m_SensorSize: {x: 36, y: 24}
-  m_LensShift: {x: 0, y: 0}
-  m_NormalizedViewPortRect:
-    serializedVersion: 2
-    x: 0
-    y: 0
-    width: 1
-    height: 1
-  near clip plane: 0.3
-  far clip plane: 1000
-  field of view: 60
-  orthographic: 0
-  orthographic size: 5
-  m_Depth: -1
-  m_CullingMask:
-    serializedVersion: 2
-    m_Bits: 4294967295
-  m_RenderingPath: -1
-  m_TargetTexture: {fileID: 0}
-  m_TargetDisplay: 0
-  m_TargetEye: 3
-  m_HDR: 1
-  m_AllowMSAA: 1
-  m_AllowDynamicResolution: 0
-  m_ForceIntoRT: 0
-  m_OcclusionCulling: 1
-  m_StereoConvergence: 10
-  m_StereoSeparation: 0.022
---- !u!4 &963194228
-Transform:
-  m_ObjectHideFlags: 0
-  m_CorrespondingSourceObject: {fileID: 0}
-  m_PrefabInstance: {fileID: 0}
-  m_PrefabAsset: {fileID: 0}
-  m_GameObject: {fileID: 963194225}
-  serializedVersion: 2
-  m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
-  m_LocalPosition: {x: 0, y: 1, z: -10}
-  m_LocalScale: {x: 1, y: 1, z: 1}
-  m_ConstrainProportionsScale: 0
-  m_Children: []
-  m_Father: {fileID: 0}
-  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!1 &1016473564 stripped
 GameObject:
   m_CorrespondingSourceObject: {fileID: -8098169881513260187, guid: c4f1549f30430f34098ddf3f474353ff, type: 3}
@@ -1207,7 +1115,6 @@ PrefabInstance:
 SceneRoots:
   m_ObjectHideFlags: 0
   m_Roots:
-  - {fileID: 963194228}
   - {fileID: 705507995}
   - {fileID: 153407404}
   - {fileID: 1188990073}

Assets/Scripts/FirstPersonController.cs

@@ -23,6 +23,7 @@ public class FirstPersonController : MonoBehaviour
 
     void Start()
     {
+        Debug.Log( "Starting game" );
         // Get the CharacterController component
         controller = GetComponent<CharacterController>();
         

ProjectSettings/ProjectSettings.asset

@@ -165,7 +165,8 @@ PlayerSettings:
   androidSupportedAspectRatio: 1
   androidMaxAspectRatio: 2.1
   androidMinAspectRatio: 1
-  applicationIdentifier: {}
+  applicationIdentifier:
+    Standalone: com.DefaultCompany.OGG
   buildNumber:
     Standalone: 0
     VisionOS: 0