Random Number Guessing Game

Ruby Fundamentals I Noncore

MAX = 30
random_number = rand(MAX+1) #This makes the range of possible number 0 to MAX, inclusive.
user_correct = false

while user_correct == false do 
	print "Guess number between 0 and #{MAX}: "
	user_guess = gets.chomp

	if ((0..MAX).include?(user_guess) == false) || user_guess[/\D/] == true
		puts "Invalid input, must enter a number between 0 and #{MAX}."
	end

	if user_guess == random_number
		user_correct = true
		puts "Congratulations, you guessed the number!"
	elsif user_guess < random_number
		puts "Too low, try again!"
	else
		puts "Too high, try again!"
	end

end