BOXBOY!

BOXBOY! is a 2D platforming puzzle game developed by HAL Laboratory and published by Nintendo for the Nintendo 3DS. It was released on the Nintendo eShop on April 2, 2015.

Characters
The player plays as Qbby, a square-shaped cube that can create boxes. As you progress, new non-player characters appear in the game: Qucy (also available as a costume in BYE-BYE BOXBOY! and as second player in BOXBOY! + BOXGIRL!) and Qudy (available through another mode). However, at certain points they will stop following you.
 * Main article: Characters

Plot
(Spoiler warning!)

After the events of BOXBOY! + BOXGIRL! (As it is presumably a prequel), you learn how to control Qbby. Picking up from where BOXBOY! + BOXGIRL! left off, the entire world appears to be covered with black smoke from a meteor crashing onto it. Qbby sets out to restore the planet, and meets Qucy around the end of World 2. Qbby and Qucy then notice the vast amounts of new doors, a projector-like object, and a drill of some kind. Around World 4, Qbby meets Qudy. Once they make it to the projector, it shows them the meteor crashing on to the planet. They then make it to the drill, and Qudy decides to sacrifice himself to help Qucy and Qbby get to the rest of the world. The world starts tilting, and they manage to make it. They then end up sacrificing themselves to save the planet, which starts to turn green.

(Spoilers end here.)

Controls
Move: D-pad

Jump: B

Duck: Down (on the D-pad)

Create: Y + D-pad

Throw (while holding box): Y

Set down (while holding box): Y

Erase box: X

Successors
In 2016, a second game for the series, BOXBOXBOY! was released. This game allows Qbby to make two sets of boxes.

A third game, titled BYE-BYE BOXBOY! was released in 2017. This title returns to the only-one-set-of-boxes rule, but there are some new power-ups too. The player also needs to escort the Qbabies, small box children, to the goal door.

A fourth game, titled BOXBOY! + BOXGIRL! was released in 2019. This title includes some new mechanics, mainly the 2-player co-op mode.