The Good: Cute art style, using depth as the core makes it unique, 3D effects add to the experience, building your own Pushmos is fun, great in short bursts
The Bad: Can be too simple at times, no extra modes
Before you write Pushmo off as a cutesy kids puzzle game think again. The game uses depth as its core which is what the 3DS is all about. You get to move blocks forward by four blocks, but you have to rescue a Pushmo at the top by figuring out how to configure these blocks. Thankfully you can jump around so this makes the game a bit easier, but not all are as easy as they seem. One puzzle can only consist of four blocks, but the way they are shaped makes it difficult to climb so you have to figure out how to stagger these to get to the top.
This makes the game original and fresh as to stray away from the Tetris, physics, and memory clones. If you feel really stumped or want to analyze what you did just rewind with the shoulder buttons or reset the whole thing via a button at the bottom of the blocks. This is the entire game, but when you get bored go ahead and build your own puzzles which adds a layer of extra fun. There are plenty of puzzles to solve, but the game is quick and easy to just play on the go without worrying about checkpoints and saves.
The art style is cute with bright colorful graphics and the 3D effects are there to help immerse you in the depth layering which makes it feel like part of the puzzle solving rather than a gimmick or something that gets in the way (like Bit.Trip Saga). With the low price point you get dozens of hours of fun content, but overall the game is just really simple and only good in short bursts. This is a game for any age, any player type, and for everyone who owns a 3DS. Right now this is the eShop's killer app and probably the best game on there.