Thanks! Yeah, you're right, the point is to get to the center, and it's a lot easier to know where that is on my original "Polar" maze https://xn--sberg-lra.net/maze/polar?size=5&entryCount=1 I should update them to have a goal icon like you say, maybe antoher time.
A friend and I wrote our master thesis on how to ergonomically fit monads into imperative programming languages [^1], taking inspiration from Haskells do-notation to get away from the method chaining. It's more on the theoretical side, but we did write a small implementation in C# [^2] (we use the exclamation mark as bind). We really could have used som better types though, this post seems have found a better direction.
