Factorio is a game where every time you solve a problem, you create at least one more to replace it.

You start the game with a handful of iron plates. So first, you need to gather some resources.
But mining resources by hand is slow and boring. So you craft some mining drills.
But they need fuel. So you mine some coal to start the drills, and even automate that.
But now you just have raw ore. So you make some furnaces and start smelting.
But now you're running around moving coal into machines by hand. So you use some conveyor belts to do that for you.
But now you've made basically everything you can. So you have to start doing some research.
But right now you're just crafting science packs by hand. So you research the assembly machines to automate that.
But now you need electric power for your machines, so you have to go set up some boilers and steam engines. And a conveyor belt of coal to keep them going.
Your starting drills are slow and you have to fuel them, so you upgrade to the electric mining drills. But now you need more power, so you add more boilers and steam engines.
But now you've actually researched some stuff and need to build it. You've hit the first tech gate where you need to make the green science packs, which require more complicated ingredients. So you expand your factory.
You're getting tired of handcrafting conveyor belts all the time, so you automate that.
But now you need more iron. So you expand the ore fields' drilling.
But now you're getting attacked by the local wildlife. So you research some military tech and place turrets.
And now you're coming up on another tech gate where you need oil. Is there even any oil around the starting area? You're going to have to hunt for it, and bring it back, and then process it.
Did I mention you've done all this but you're still in the "early game"?

There is so much to do in this game. Your first game will probably take you several dozen hours at least. And along the way you'll make mistakes and learn from them and realize how you can do better next time. Maybe you'll do some challenge runs for the achievements. Or you can use the absolutely FANTASTIC in-game mod portal to mod up your game however you like and replay Factorio in a whole new way.

Multiple times.

Absolutely, 100% worth it at full price. If you feel intimidated by looking at screenshots and videos, don't be; the game has an exceptionally gentle learning curve, and YOU are the one in control of the direction of the research tree. You introduce yourself to new concepts at YOUR pace and in the order YOU want. Mistakes are cheap and provide great learning opportunities. You can freely experiment with things in your save files or in the sandbox mode to learn how stuff works. It's a fantastically made game all around and I wholly and emphatically recommend it.

Factorio is a game where every time you solve a problem, you create at least one more to replace it. You start the game with a handful of iron plates. So first, you need to gather some resources. But mining resources by hand is slow and boring. So you craft some mining drills. But they need fuel. So you mine some coal to start the drills, and even automate that. But now you just have raw ore. So you make some furnaces and start smelting. But now you're running around moving coal into machines by hand. So you use some conveyor belts to do that for you. But now you've made basically everything you can. So you have to start doing some research. But right now you're just crafting science packs by hand. So you research the assembly machines to automate that. But now you need electric power for your machines, so you have to go set up some boilers and steam engines. And a conveyor belt of coal to keep them going. Your starting drills are slow and you have to fuel them, so you upgrade to the electric mining drills. But now you need more power, so you add more boilers and steam engines. But now you've actually researched some stuff and need to build it. You've hit the first tech gate where you need to make the green science packs, which require more complicated ingredients. So you expand your factory. You're getting tired of handcrafting conveyor belts all the time, so you automate that. But now you need more iron. So you expand the ore fields' drilling. But now you're getting attacked by the local wildlife. So you research some military tech and place turrets. And now you're coming up on another tech gate where you need oil. Is there even any oil around the starting area? You're going to have to hunt for it, and bring it back, and then process it. Did I mention you've done all this but you're still in the "early game"? There is so much to do in this game. Your first game will probably take you several dozen hours at least. And along the way you'll make mistakes and learn from them and realize how you can do better next time. Maybe you'll do some challenge runs for the achievements. Or you can use the absolutely FANTASTIC in-game mod portal to mod up your game however you like and replay Factorio in a whole new way. Multiple times. Absolutely, 100% worth it at full price. If you feel intimidated by looking at screenshots and videos, don't be; the game has an exceptionally gentle learning curve, and YOU are the one in control of the direction of the research tree. You introduce yourself to new concepts at YOUR pace and in the order YOU want. Mistakes are cheap and provide great learning opportunities. You can freely experiment with things in your save files or in the sandbox mode to learn how stuff works. It's a fantastically made game all around and I wholly and emphatically recommend it.