The controls are a bit awkward at times, and the boss's attacks occasionally feel unfair (you're no longer under his shadow or within his strike range, but the damage still registers). The visuals are fantastic—I really loved them. The ending was disappointing, though—it's not really there. It's abrupt and that's it—no "The End" message, nothing.
Overall, a tremendous amount of work was done in just a week. The game is a 4/5.