Botanicula is a visual and auditory treat with a whimsical story that, as others have pointed out, feels a lot like an old Pixar short. The player directs a fruit and its companions on a quest to rescue their ecosystem from vile, life-sucking spider-monsters. The game contains no dialog, either voiced or as text, relying instead on animated prompts. The story is advanced by solving puzzles with a variety of mechanics, making this a puzzle game in addition to interactive fiction.
I do have a bone to pick with the gameplay of both this game and, to a lesser extent, its predecessor from Amanita Design, Machinarium. Too many of the puzzles reduce to randomly clicking on and moving things around until they work. The "Aha!" moment for these puzzles comes only after one has stumbled upon the solution (although sometimes there's no such moment at all), and that robs the player of the satisfaction of figuring it out. In a game where the core mechanic is solving puzzles to advance the story, that's less than ideal. Somewhat unfortunately, both games are given a pass for this because they're artsy, and holding them up as the greatest works of the computer age supposedly shows one's sophistication and good taste.
But yes, if you're into games as an artistic and storytelling medium, this is worth a play. The aesthetic is awesome, and it's no mistake that this and Machinarium have had a big influence on countless indie adventure games. In the vain of knowing what you're paying for, do keep in mind that Botanicula is a short game. Even a first playthrough can be completed in three or four hours.
