So far, the plot is a little thin in this game, it seems to consist of people impeding your progress to make you solve a puzzle, but the puzzles have all been really great so far.
For instance, so far into the game I've come across one of those "take animals across a river with a raft but you can't have more of one kind than another on a side" puzzle and the "find which weight is the lightest out of 8 using a scale only twice" puzzle.
So if you like logical and lateral thinking puzzles, and you also like beautiful Miyazaki-esque visuals, this will pretty much be game of the year for you, I'd say.
Babelfish is your friend... sort of. The guy's official site is at the end of the video. Go there and translate. He did, in fact, play through the whole game like that. But in an emulator, at ONE frame per second.