It "works"

It's a buggy mess but it's a working buggy mess

Assets/Scripts/Player/CameraController.cs

@@ -70,4 +70,7 @@ public class CameraController : MonoBehaviour
         // Sets its location to where it is tracking
         transform.position = m_Tracking.position;
     }
+
+    // Adds a way for external forces to modify the direction the player is looking
+    public void RotatePlayerDirection(Vector2 dif) => m_Rotation += dif;
 }

Assets/Scripts/Player/PlayerFixedUpdate.cs

@@ -22,6 +22,9 @@ public partial class PlayerMovement : MonoBehaviour
     // Fixed Update is called once per physics update
     private void FixedUpdate()
     {
+        // Resets portal state
+        m_PortalFrameCounter = Mathf.Max(0, m_PortalFrameCounter - 1);
+
         // Works out the new state of the player
         UpdatePlayerState();
 
@@ -81,10 +84,21 @@ public partial class PlayerMovement : MonoBehaviour
         m_Body.velocity = v;
 
         // Doubles gravity if falling to feel less floaty
-        if (v.y < 0.0f) { GravityController.Instance().SetScale(8.0f); }
-        else { GravityController.Instance().SetScale(3f); }
+        if (v.y < 0.0f) { GravityController.Instance().SetScale(2f); }
+        else { GravityController.Instance().SetScale(1f); }
 
         // Clears all stored collisions
         m_WallCollisions.Clear();
     }
+
+    public void WentThroughPortal(float change)
+    {
+        // Resets the counter
+        m_PortalFrameCounter = 3;
+
+        // Rotates the velocity of the player
+        Vector3 vel = m_Body.velocity;
+        vel = Quaternion.AngleAxis(change, Vector3.up) * vel;
+        m_Body.velocity = vel;
+    }
 }

Assets/Scripts/Player/PlayerMovement.cs

@@ -82,6 +82,9 @@ public partial class PlayerMovement : MonoBehaviour
     //
     Vector3 m_WallNormal;
 
+    //
+    int m_PortalFrameCounter = 0;
+
     // Only instance of the player
     static PlayerMovement s_Instance;
 
@@ -89,6 +92,8 @@ public partial class PlayerMovement : MonoBehaviour
     public static Vector3 Pos() => s_Instance.transform.position;
     public static void SetPos(Vector3 v) => s_Instance.transform.parent.position = v;
     public static GameObject Object() => s_Instance.gameObject;
+    public static bool CanGoThroughPortals() => s_Instance.m_PortalFrameCounter == 0;
+    public static PlayerMovement Instance() => s_Instance;
 
     // Start is called before the first frame update
     private void Start()

Assets/Scripts/Player/PlayerUpdate.cs

@@ -1,4 +1,5 @@
 using UnityEngine;
+using UnityEngine.SceneManagement;
 
 public partial class PlayerMovement : MonoBehaviour
 {
@@ -56,6 +57,12 @@ public partial class PlayerMovement : MonoBehaviour
         ApplyDrag();
 
         // Displays the speed of the player to the screen
-        m_SpeedDisplay.text = "Speed: " + new Vector3(m_Body.velocity.x, 0.0f, m_Body.velocity.z).magnitude.ToString("0.00") + " m/s";
+        m_SpeedDisplay.text = new Vector3(m_Body.velocity.x, 0.0f, m_Body.velocity.z).magnitude.ToString("0.00") + " m/s";
+
+        // Reloads the game to stop falling off
+        if (Input.GetKey(KeyCode.R))
+        {
+            SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex);
+        }
     }
 }

Assets/Scripts/Player/SlidingMovement.cs

@@ -36,7 +36,7 @@ public partial class PlayerMovement : MonoBehaviour
             m_Body.AddForce(slopeDir.normalized * m_SlideSpeed * m_Body.mass * 10, ForceMode.Force);
 
             // Checks if the player wants to jump
-            if (m_JumpKeyPressed) { Jump(5.0f, true); }
+            if (m_JumpKeyPressed) { Jump(2.0f, true); }
         }
 
         // If at the start of a slide provides a boost to the player or if the player is on a slope

Assets/Scripts/Player/WallRunningMovement.cs

@@ -39,7 +39,6 @@ public partial class PlayerMovement : MonoBehaviour
 
         else
         {
-            Debug.LogError("SOMETHING WENT WRONG");
             normal = Vector3.zero;
             return false;
         }