Wow, that was fast! It's almost like I predicted your next update! This really makes the game feel more alive.
You could also add a leaderboard to let players compete with each other. It's actually pretty easy to implement, at least in Unity. I added one to my own game using LootLocker, completely for free.
By the way, I'd really appreciate it if you could give my game a try and let me know what you think!