Move a tiny box with even tinier arms, legs and a face through platforming levels, by producing additional boxes from within himself. That was the premise of 2015's BoxBoy!, and this sequel takes the next natural step: the ability to form two sets of boxes on screen at any time, which can then be joined together to complete any level. It sounds very easy. It categorically is not, particularly once you’ve finished all ten worlds and go back for more – with extra challenges and obstacles. Its bite-sized yet taxing addictiveness has a timeless quality that calls back to seminal Game Boy puzzler Tetris, making it an essential purchase for any 3DS owner.