This was my favorite 2018 Ifcomp game. I can imagine that this game is not for everyone, since it is basically a logic/math game. However, it does not require a lot of mathematical knowledge. I would say that you can complete the game using basic math, though to get a perfect score, you should have heard about complex numbers.
In this game you are given the role of a candidate in something called Arithmancy, which is some sort of magic concerning numbers. You need to pass the exam in Arithmancy. To do this, you have to cast spells in the right order, to produce the digits of pi, e, etc. I don't know if this sound like a lot of fun, but it is, if you like logic and math puzzles. In addition, you can get extra points. Some points require that you produce the digits with very few spells, while other points can be gained by finding the numbers with a given color. Yes, in this game all the numbers have a color, though some numbers have the same color. Figuring out the color system, at least to some extent, is needed to obtain a perfect score. I didn't understand the color system completely, but still I managed to get a perfect score, though not within the two hour limit of IFcomp. Thus there are several hours of entertainment in this game.
The game starts out easy but slowly gets harder. Whenever you achieve something in the game, you overhear conversations from the examining committee, which are quite fun. The real fun for me was however figuring out the puzzles.
So if you are into logic puzzles involving math, I can highly recommend this game.