Isn't pretty much everything an accessibility issue, then? After all, that the game only ever shows you one bit of information at a time is a huge accessibility problem.
The "precise typer" thing is more a difficulty than anything else, isn't it? Some people will of course find it harder to type without seeing the results than others. Plus, is there really a difference between you pressing the up arrow and you've got a character moving upwards, and you pressing the J key and a J appearing on screen? It's still a form of clear visual feedback on exactly what you pressed and what it did.