Subway Surfer like Curved World Shader for Unity

Curved.shader

Shader "Custom/Curved" {
	Properties {
		_MainTex ("Base (RGB)", 2D) = "white" {}
		_QOffset ("Offset", Vector) = (0,0,0,0)
		_Dist ("Distance", Float) = 100.0
	}
	SubShader {
		Tags { "RenderType"="Opaque" }
		Pass
		{
			CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag
			#include "UnityCG.cginc"

                        sampler2D _MainTex;
			float4 _QOffset;
			float _Dist;
			
			struct v2f {
			    float4 pos : SV_POSITION;
			    float4 uv : TEXCOORD0;
			};

			v2f vert (appdata_base v)
			{
			    v2f o;
			    float4 vPos = mul (UNITY_MATRIX_MV, v.vertex);
			    float zOff = vPos.z/_Dist;
			    vPos += _QOffset*zOff*zOff;
			    o.pos = mul (UNITY_MATRIX_P, vPos);
			    o.uv = v.texcoord;
			    return o;
			}

			half4 frag (v2f i) : COLOR
			{
			    half4 col = tex2D(_MainTex, i.uv.xy);
			    return col;
			}
			ENDCG
		}
	}
	FallBack "Diffuse"
}

CurvedControls.cs

using UnityEngine;
using System.Collections;

public class CurvedControls : MonoBehaviour
{
    Vector2 Offset = Vector2.zero;
    float camPos = -20;
    public Material[] Mats;
    public Transform cam;
    
    void OnGUI ()
    {
        GUILayout.BeginArea(new Rect(5,5,Screen.width-10,Screen.height-10));

        GUILayout.BeginHorizontal();
        GUILayout.Label("xOffset",GUILayout.Width(100));
        Offset.x = GUILayout.HorizontalSlider(Offset.x,-20,20);
        if (GUILayout.Button("0",GUILayout.Width(30)))
            Offset.x = 0;
        GUILayout.EndHorizontal();

        GUILayout.BeginHorizontal();
        GUILayout.Label("yOffset",GUILayout.Width(100));
        Offset.y = GUILayout.HorizontalSlider(Offset.y,-20,20);
        if (GUILayout.Button("0",GUILayout.Width(30)))
            Offset.y = 0;

        GUILayout.EndHorizontal();

        GUILayout.BeginHorizontal();
        GUILayout.Label("Cam pos",GUILayout.Width(100));
        camPos = GUILayout.HorizontalSlider(camPos,-40,30);
        GUILayout.EndHorizontal();
        GUILayout.EndArea();
        foreach(Material M in Mats)
        {
            M.SetVector("_QOffset",Offset);
        }
        Vector3 P = cam.position;
        P.z = camPos;
        cam.position = P;

    }
}