I had a fun time with this title: especially with the point and click sections. I didn't get all of the endings, but I enjoyed the ones I did get - including the true ending. The character art is also nice and expressive.
Some of the visual effects you used here were really cool too: like the math-solving scene with the protagonist, and the flashback filter you used for certain spoilery parts of the game.
SPOILER STUFF BELOW:
Also... zombified Professor Fields is really something, isn't he? Love, love, love his glasses shine expression - I adore seeing mad scientist characters, and I'm glad I've met one extra this Spooktober.