One More Box
HAL Laboratories released BOXBOY! on the eShop last year, and it seems like they were keen enough to create a sequel. The follow-up, BOXBOY! One More Box is out right now in Japan, by way of the 3DS eShop for 630 Yen.
This is one of the few major releases I didn't get a chance to really dig into, but I think I may fix that in the near future. There's no word yet on a localization.