Space House

Space House is the Tutorial World in Plants vs. Zombies: The Century Gate. The world takes place on the Player's house in space, where somehow everybody is breathing fine. It's 5 levels long, and introduces the player to the concepts of the game. It is the only world in the game without an exclusive Brain Buster. Unlike PvZ2, you can replay this world after beating it.

Game Description
The description tells basically what's happened up to this point and why your house is in space.

"After Crazy Dave eats his original taco, space and time begins collapsing making him and the player stuck in the Player's house as they make their way over to the Database and fight off zombies trying to get in."

Gimmicks
While the world itself has no gimmicks like graves or anything, as you go on in the levels you get another piece of the lawn available, meaning that by the final level you'll have a full lawn.

Upon starting the first level
Crazy Dave: Penny, why is the lawn suddenly only with one row, and where'd all the seed packets go?

Penny: It seems that space and time falling apart has caused us to lose all of our seeds and reversed the lawn to it's original appearance. However, it seems that Peashooter found it's way to us.

Crazy Dave: Well, I guess we'll have to teach you the basics again, [insert player's name here]. I bet it wiped your brain and all the knowledge you had!

Start of Day 2
Crazy Dave: Penny, I found Sunflower!

Penny: Excellent, having a way to produce sun faster will be very beneficial to us if we're going to survive these zombies.

Start of Day 3
Penny: I sense that Wall-Nut right there is endangered, but if we protect it we may get it's seed packet.

Crazy Dave: I'll pretend that makes perfect sense!

Start of Day 4
Penny: If we survive today, user Dave, we'll get the last plant hiding in here.

Crazy Dave: Well, that's good. BECAUSE I'M CRAAAAAZYYY!!!!

Start of Day 5/Boss Level
Penny: The Database is right ahead, but so is a Gargantuar!

Crazy Dave: You know what this means.... ARM THE POTATO MINES! WHY? BECAUSE I'M CRAAAAAZYYYYY!

After winning Day 5
Penny: User Dave, if you need any help we can always just return here.

Crazy Dave: I don't need help, i'm-

Penny: Crazy, yes we know.

Crazy Dave: No, I was going to say something different.

Penny: What?

Crazy Dave: I'M CRAAAAZZZZIIIIII!

Plants
Coming soon....

Zombies
Coming soon....

Days
Coming soon....

Trivia

 * The first four plants obtained are the first plants obtained in PvZ1 (minus Cherry Bomb, who isn't available yet) as well as the first four plants obtained in PvZ2