Unturned, in its current state is a great game which already has offered us much more than we bargained for, at $5:00 USD Unturned can be played for thousands of hours and can be played by almost anyone.
Spending over 900 hours on the game I've grown bored of it, the problem with Unturned is once you're set you're set! Once you have a great base with good loot theres no progression.
Online survival and the arena mode offer players a challenge.
Though arena mod also gets boring.
Suggestion: Don't play too much of this game, you might just get bored of it!