Absolutely superb. The art style was crisp, particularly for the CGs which were employed well. It felt very satisfyingly Game Boy Advance-like on a tactile level. I liked the classical music choices as well and am always up for a good use of Dies Irae. In an ideal world, I guess I might have wanted it to be a bit longer but that may be because I was enjoying my time with it so much and liked chewing on what was being put down. All said, it probably has the right amount of ambiguity and a sort of hollow feeling that is I believe what the intention was; it thuds at the end just so. There's another timeline in which having something after the end of the trial could set it off just right but it's possible that doing so would defeat the point of the thing. 

Also Beauregard is simply the best ever