Feels pretty hard to beat
Sens and speed need adjusting but more so just the ai - always knows where you are and is always chasing you, but there's no loops and very few even medium sized rooms to loop let alone large ones
Shouldn't know where you are, can maybe tell when you pickup a fish (or a little pick a fish nearby to visit) but otherwise needs to not follow you into dead ends when you can't get around him
Last thing would be an audio slider