While entertaining - most Picross games are - this game's use of unlocks, badges, prizes, and even unlockable *options menus* made things vastly too slow and complicated. I would much rather play ten very difficult puzzles than the two hundred easy puzzles which precede them. At least make Normal and Hard modes unlocked to start!
However, the convoluted unlock system aside, the game has solid puzzles and I appreciated the implementation of mouse and keyboard control on a Picross game.