PGiZ4/Assets/Code/Gameplay/Management/GameSpeedManager.cs

using UnityEngine;
using Code.Gameplay.Player;

namespace Code.Gameplay.Management
{
    public class GameSpeedManager : MonoBehaviour
    {
        [SerializeField] private PlayerController playerController;
        [SerializeField] private float speedMultiplier = 1.2f;
        [SerializeField] private float timeInterval = 10f;

        private float _timer;

        private void Update()
        {
            _timer += Time.deltaTime;

            if (_timer >= timeInterval)
            {
                AccelerateGame();
                _timer = 0;
            }
        }

        private void AccelerateGame()
        {
            if (playerController)
            {
                playerController.IncreaseSpeed(speedMultiplier);
            }
        }
    }
}