Alice Through the Looking Glass: An Animated Classic is a delightful, imaginative, and magical story that takes viewers on a fascinating journey into the renowned sitemap of childhood fantasies. This animated feature film is a direct and adored adaptation of Lewis Carroll's follow-up to his extraordinary novel, "Alice's Adventures in Wonderland." Intended for both youngsters and those young at heart, it consistently persuades the idealistic proposition of curious exploration, radiant imaginings, and inexplicable adventures.

The story picks up where its precursor ended, with Alice returning back home from Wonderland. However, the regular world doesn't hold her interest for a long while. As a testament to Carroll's ingenious storytelling, Alice soon finds herself looking through another enchanted glass that transports her to a mystical, upside-down world filled with a collection of entertaining characters who are as peculiar as they are enchanting.

Visually, the movie is a splendor - utilizing lively and glistening animations that effectively capture the enchanting setting, the unique characters, and the captivating environment that is woven into the storyline. The animators' skill in achieving a perfect blend of colors lends vibrancy to every frame, thus genuinely bringing Carroll's vibrant imagery to life. The film, through its animation, successfully amalgamates the charm of old-school hand-drawn animation with modern technical enhancements, resulting in illustrations that are quaint yet contemporary in style.

As expected, Alice, the protagonist, is as bright-eyed, inquisitive, and lovable as always. She navigates the mirrored fantasy world with the same mix of anxiety, surprise, and sheer determination, consistently drawing us into her child-like wonder and disbelief. Daily life's logic has no place in Alice's world, and this contradiction is brilliantly portrayed through Alice's reactions to the absurdities around her.

As Alice stumbles from one bizarre circumstance to the next, viewers are introduced to an eccentric lineup of characters. These include talking flowers, peculiar twins named Tweedledum and Tweedledee, and a shapeshifting caterpillar. Other manipulative chess pieces, such as the pompous and regal Red Queen, the somewhat befuddled White Queen, and various capricious animals and objects with human qualities, make things even more whimsical and entertaining.

Narratively, Alice Through the Looking Glass: An Animated Classic doesn't follow a traditional plot structure - instead, it aims to provide a series of enthralling encounters and audacious situations, reflecting the source material’s surreal spirit. Much like a dream, the sequence of events may not always make logical sense; yet, they create a potent allure that keeps audiences hooked, testing the boundaries of imagination.

One of the film's notable elements is its musical score. Nestled perfectly within Carroll's idiosyncratic universe, it is quirky, lively, and perfectly underscores the overall magical ambiance of the film. The musical interludes not only enhance the viewing experience but also add a significant degree of charm and warmth to the proceedings.

However, the movie isn't just about odd characters and zany adventures. It subtly serves several life lessons through Alice's experiences. Alice's quest to become the Queen by reaching the other end of the chessboard mirrors our life's journey, filled with obstacles and peculiar characters. The complexity of her encounters often feels like an allegory for the trials of adulthood that await beyond the realm of childlike innocence.

Despite the fantastical setting, the spotlight remains on Alice and her journey of self-discovery. She learns to trust herself, face her fears, and problem-solve in real-time, constantly challenging herself while experiencing a profound personal growth through bizarre circumstances.

On the whole, Alice Through the Looking Glass: An Animated Classic is more than just an animated film. It's a voyage down a fascinating labyrinth of imagination, brimming with whimsy, innocence, and the sobering touch of reality. The film's unique animation style, memorable performances, clever details, and pure, fervent imagination make it a must-watch, a timeless classic promising an unforgettable journey within the realms of a child's imagination.