The character design is quite impressive, all but the purple dog and the monsters. The oversized warrior is an admirable character, due to his great (and naive) kindness, and of course, his looks (design). The movie's best design is however the servant of the gal's father, even though it's the kind seen before (that of villainous characters).
The world of the movie is unlike I've seen before, a world with weird gravitational behavior, with pieces of ground constantly breaking from the land and floating in the air. It's a dark story that, sadly, feels too short.