The first ten minutes of Ori and the Blind Forest depict a beautiful and soul-crushing story of friendship, selflessness, and loss. They recall the opening minutes of Pixar's Up! in their melancholy, and like in Up!, the introduction provides an emotional foundation for the life-affirming journey that follows. It is a phenomenal opening--a short and wordless tale, playacted by two expressive characters who move with purpose and demonstrate pure affection towards each other.

There's a certain elegance to the game's initial sorrow, and it translates to the way you move through this exquisite 2D platformer. Ori and The Blind Forest is, on a fundamental level, structured as so many other platformers are; It springs from the Metroid and Castlevania tradition, gating your progress behind doors that can only be opened once you have learned a particular skill. As the nimble, lemurlike Ori, you leap and flit about with fantastic grace, and as Ori's abilities improve, so do the joys of navigating his world. When you learn how to climb walls, Ori responds wonderfully to subtle movements of the analog stick, allowing you to finesse him into exactly the right place, such as a sliver of stone embedded within a sea of lava. When you earn your double-jump, Ori somersaults like an acrobat and reacts in mid-air to your aftertouch. What a delight to have such fine control over a character this agile.

One by one, you learn new skills, and new challenges arrive with them. Ori can fire energy orbs at nearby foes when he isn't avoiding them completely, and those creatures can be difficult to overcome. The blobs that stick to walls and ceilings? They aren't much of a hassle, at least until they coat the surfaces you need to cross and spit acid onto the ground. They won't let you stay still: You must take advantage of Ori's dexterity, by leaping over acidic pustules, jumping from wall to wall, or putting the other abilities you have to good use. For instance, you ultimately learn how to deflect projectiles, aiming them back at your foes while propelling yourself in the opposite direction. Turning an oncoming ball of fire back towards its owner is fun, but if you don't pay attention, you could thrust Ori into a wall of spikes, or into a crow hovering nearby.

Propelling yourself through the sky in this manner becomes one of Ori and the Blind Forest's most vital maneuvers. When you first learn it, you typically use the glowing lanterns that dangle from overhangs. Soon, however, you must fire Ori through treacherous areas replete with fiery spheres and those pesky crows, which hurl towards you as if launched from a slingshot. Timing is crucial, as is quickly determining the safest trajectory that still delivers you to your destination. That mid-air fling is at the heart of one of the game's most thrilling scenes: a difficult escape from roaring tides that swallow you whole should you make a single grievous error.

It's important, however, not to mistake Ori and the Blind Forest for being simply beautiful. It certainly is--but it is also unceasingly clever. It consistently surprises you with new tricks: gravitational divergences, new ways to move through its spaces, and carefully designed levels that require you to think quickly and respond. It is not as snappy as, say, a typical Mario platformer, seeking instead a broader gameplay arc stretching across a single, interconnected world. It's a superb and thematically consistent approach that allows Ori and the Blind Forest to build joy on a bed of heartache, adding a new layer of mechanical complexity with each ray of hope.