Thanks a lot for the detailed feedback. Enemies killing you from behind and adjusting fov are things that we just didn't have time to fix. Having an ingame minimap to show enemies and a settings menu for adjusting fov, aim speed etc were sadly scrapped. At one point we just prioritized certain features to finish the game before the deadline. As for remembering the rules, you can hold down TAB to see an ingame UI that shows you the rule for each chess piece. Again, thank you for your detailed comment.