I thought I'd check back in with how my adventures in Terraria are going so far. After 6 hours of playing I've had the chance to explore quite a bit of the world and I've found several deep caves with lots of ore and pots and monsters. 
Unfortunately I did not know that you needed a hammer to break the heart containers so I've ran by quite a few of them before making myself a hammer. 
What I've been focusing on mostly is collecting stone and making grey bricks so that I have lots of material to build a big house/castle. I also today learned that you need to build houses for merchants so that they will move in and you can buy stuff from them (this was mentioned in the Quick Look but I forgot). 
 

I thought I'd check back in with how my adventures in Terraria are going so far. After 6 hours of playing I've had the chance to explore quite a bit of the world and I've found several deep caves with lots of ore and pots and monsters. 
Unfortunately I did not know that you needed a hammer to break the heart containers so I've ran by quite a few of them before making myself a hammer. 
What I've been focusing on mostly is collecting stone and making grey bricks so that I have lots of material to build a big house/castle. I also today learned that you need to build houses for merchants so that they will move in and you can buy stuff from them (this was mentioned in the Quick Look but I forgot). 
 

Make a bigger house with closed off doors and multiple floors and start getting NPCs to show up.

Can houses/structures be built atop cave entrances? I've seen doors and the like, but only those that open horizontally. I think it would be amusing to generate basically mine-entrance airlocks. 
 
Also, I haven't seen if the game has ladders/ropes. Since most of it appears to revolve around jumping, it might be useful to make some sort of stairs to go up/down into particularly deep shafts. But I suppose that's only useful if a shaft gets visited repeatedly (more than three times I guess) in any given game. ξ

i suggest getting a gold sword as soon as possible, makes killing those weaker mobs a cake walk :D

Can houses/structures be built atop cave entrances? I've seen doors and the like, but only those that open horizontally. I think it would be amusing to generate basically mine-entrance airlocks.  Also, I haven't seen if the game has ladders/ropes. Since most of it appears to revolve around jumping, it might be useful to make some sort of stairs to go up/down into particularly deep shafts. But I suppose that's only useful if a shaft gets visited repeatedly (more than three times I guess) in any given game. ξ

Can you build a Metroidvania world within Terraria?

Would that work?

Just started this after the Quick Look. Quick question, is the starting NPC supposed to move into my house? 'Cause he's just hanging out outside. 

You can put doors anywhere as long as their floor and ceiling are spaced right. I got little doors all over my caves. 
I totally built and enclosed space high in the air, like an air hallway over the trees, so I can just run over to the alien looking area without dealing with any enemies or bumpy terrain. So I think in the future, the "main game" is just going to be something that exists, the legs on this game come from the shit people make in their worlds and share. I think there should be an option where you share a map but other people can't permanently change it. That way you could make structured levels where chests have items and shit in them for everybody.

I have like 18 rooms in my stupid house, NPCs refused to move into most of them despite the fact they fit the criteria of a house. But now I have everyone so its ok.