Terraria + Metroid = Asteria.
This isn't a bad thing if you like both games, not at all.
The game is streamlined, fairly challening and kept me entertained right up until the end.
My only complaint is there isn't vanity items and such like Terraria has.
The controls, music, exploration, etc are exactly like Terraria, except that this is futuristic. Later on when you farm ores, etc you'll have great items with which to do so and cut large swaths of the world away.
-Gameplay, Music, Exploration
-Items don't require you to figure out paterns, everything you can build is clearly outlined, you just need the materials.
-When you mine, gas is expended so you can't continually mine. You have to be smart about how you do it so that the gas escapes upwards into the atmosphere. This sounds like it's annoying but it's actually a good feature.
-Inventory is limitless, so no micro managing how much stuff you can carry.
-Controlls. They are exactly the same as Terraria; which is perfect.
-Weapons , there are some really neat weapons in the game and the weapon progression isn't to steap.
I havn't had a chance to set off the nuke yet :)
-When crafting it defaults to making the MAX # of a unit. This screwed me late in the game because of a mistake I made crafting way to many of an expensive item. I forgot to quit without saving..
-There's a bug or issue with portals sometimes in which you go back to the starting area of the game, not the portal you're saved too. I lost where my home base was and it took me about 2 hours to find it again :)
This is arguably not a con!
If you like Terraria, you'll like this for a good 10-20 hours if you're so inclined to finish it. It's got all of the base things that Terraria has and it's put a nice spin on things.