My implementation of the NumberWizard game from the Udemy Unitycourse

NumberWizard.cs

using UnityEngine;
using System.Collections;

public class NumberWizard : MonoBehaviour {

	int max;
	int min;
	int guess;
	
	void Start () {
		StartGame();
	}

	void StartGame() {
		max = 1000;
		min = 1;
		
		print ("Welcome to NumberWizard!");
		print (string.Format("Pick a number between {0} and {1}, but don't tell me.", min, max));
		
		max += 1;
		/* for the binsearch: min <= guess < max, and here we want
		to include max, so add one so that 1000 can be guessed. */

		print ("Press ↑ if your number is higher, ↓ if your number is lower, or ⏎ if I am correct.");
		NaturalBinSearch(min, max);
	}

	void Update () {
		if (Input.GetKeyDown(KeyCode.Return)) {
			print ("I was right!");
			print ("=========================");
			Start();
		} else {
			if (Input.GetKeyDown(KeyCode.UpArrow)) {
				min = guess + 1; // target >= min
				NaturalBinSearch(min, max);
			}
			if (Input.GetKeyDown(KeyCode.DownArrow)) {
				max = guess; // target < max
				NaturalBinSearch(min, max);
			}
		}
	}

	/**
	 * Takes a min and a max. Guesses close to halfway to disguise the binsearch
	 * min <= guess < max
	**/
	void NaturalBinSearch(int min, int max) {
		guess = (min + max) / 2;
		guess += (int) Mathf.Floor((Random.value-0.5f) * ((max-min) / 4f));
		if (guess < min) {
			guess = min; // in small ranges the fudge can go below min because of flooring
		}
		print(string.Format("Is your number {0}?", guess));
	}
}