The two boxes displayed are the stickers FU and FUR, that is, an edge and a corner sticker on the F face. A sticker is white if that sticker is the same color as the F center, and gray otherwise. The puzzle can be controlled like other qCube puzzles: Heise-style keyboard controls, and space to scramble.
This is not the absolute minimum amount of information necessary to solve the cube, but it's pretty close. I feel like anything less would be significantly harder to solve (not that this isn't already hard - but it IS doable).