This is a rather interesting project with a number of drawbacks.
During the recording, the FPS really leaves much to be desired.
And a bunch of arrows + mouse is really not the best solution, as for me.
Unfortunately, the FPS does not allow us to evaluate all the points and maybe I missed some interesting references.
But the concept is good and the game has its own charm.
(And forgive my English, I use a Google Translate due to lack of knowledge of the language)