the unknown command matcher does not work sufficiently to match most arbitrarily wrong inputs. :unknown only matches a single unknown input, but it should match any number of inputs. so :unknown -> :unknown :unknown | nil? something like that.

every handler has to be a function definition of form (fn [game unknowns] body), which is a lot of boilerplate. find some way to simplify the format so that it's easier to write handlers.

also, this format means that if a score is changed and displayed in the same handler, (:score game) in the display will be outdated unless you apply the score difference twice. very annoying.