I brought Terraria on Google Play like 5 years ago, and re-downloaded it recently. It's like 2D Minecraft with extended element that to give you a longer main s

I brought Terraria on Google Play like 5 years ago, and re-downloaded it recently. It's like 2D Minecraft with extended element that to give you a longer main storyline. Yesterday I was planing to randomly dig a hole in the game to mine whatever there is before go to sleep. Two minute into the digging, I found something blinking, it's "Sliver"! So I mined the whole chunk, look at the time (23:20) and decided to call it a day. But just before I quit the game, I noticed another chunk is blinking, turns out it's "Gold"(!!!) ... The pattern repeated until my clock says 1:40(!!!) Man! I'm over 30 years old now and that little game tricked me out of my schedule (!!!), again! I think game like this is definitely designed to do that. They always trying to create an attraction loop so the player don't have chance to break out and quit the game. Half-Life is not designed like that. In Half-Life, you have break points, for example, every time the loading screen shows, player may start to think "Hey, maybe I'll just pause here?". Plus, Half-Life gives you a lots of "Solitude moments", allowing you to break out the game during that. Another thing I guess, is games like Minecraft and Terraria requires player to be able to immerse themselves into the game. Many people I know thinks Minecraft is a game that lets you "Cut trees and build houses. Boring!", not a single one of them would play the game for more than 5 minutes. If you can pass that 5 minutes test, I guess then you probably have the ability to find some interesting things to do in the game all by yourself (Meaning you are a self-immersive kind person).