LocksQuest is possibly the most underated DS game ever
Story: I don't want to spoil anything. I'll be very basic.
It's about a boy named "Lock" in a world filled with a blue aura called "Source"
People who manipulate "Source" are called "Archineers"
The World just came out of a war between "The Kingdom" (Good Guys) and "The ClockWorks" (Bad Guys)
You will see how the boy is enrolled deeply within the war's past as you progress through the story. This has so many twist and turns, it's unbelievable.
Score: 9.7 (Amazing Story, but, the end is a cliff hanger, so it leaves you annoyed... That could be a make it or break it for you, me personally, I don't like it..)
Gameplay: The Gameplay is very fun, repetitive, though.
You have 2:00 minutes to make defenses against the "ClockWorks"
You can make a variety of things. Traps/Towers/etc
Then after the 2:00 minutes, the battle begins. You will gain abilities throughout the story to help you defend.
Score: 8.6 (Fun Gameplay, but, it's repetitive.)
Graphics: Graphics are solid in DS standards. Not much else.
Controls: You use the Stylus for the most part of the game. Controlling you're character "Locke", placing you're buildings/traps, and picking where you want to go on the "World Map." It works really well, it gets uncomfortable after a while, though.
Final Score: 9.0 (The Story by itself should make you buy it. Other then that, the gameplay is solid, the Graphics are solid, and the Controls are solid.
I know this isn't the best review, it's my first time actually reviewing stuff.
I really recommend you buy it!