Now that there are multiple reviews out there, we can scoop them up and present them to you as individual tiles in a mosaic titled "how good some different reviewers think Lock's Quest is." Preview: quite good.
It's really hard to pick out just one excerpt from this glowing 1UP (91%) writeup. It's pretty clear that Phillip Kollar likes the game, at least: "The game effectively straddles the line between traditional tower defense and full-on real-time strategy, requiring the more fast-paced, on-the-fly tactics of the latter without ditching the addictive, pick-up-and-play nature of the former."
WorthPlaying (90%) found it, well, worth playing: "Lock's Quest is the sort of game for which the DS was made. It's quick and easy to pick up and play, makes great use of the touch-screen, and is just an overall delightful game. It isn't perfect, and there are plenty of places for a sequel to improve on, but it's charming, fun and one of the best titles to hit the DS this year."
IGN (86%) completely fell for the game's charms: "Lock's Quest is by far one of the most original, inspired, and entertaining experiences we've had on DS this year. Everything from the unique build mode to the impressive audio/visual offering, the immersion found in cinematic intros and story-developing cut scenes throughout, and even the random tongue-in-cheek dialogue lines thrown in to remind players that this is a game, made by gamers, are very welcome."