A fun mechanic, well implemented. I appreciate the shadows of the enemies forecasting where they will be on the next reset.
Might be helpful to add a clock/countdown element to the screen. I was uncertain at the start if the reset was purely time-based, or if it was based on a certain number of moves from me.
Thematically it's an interesting concept... it's a memory game about a fish with no memory. Making the player feel like the fish is the ultimate achievement I think... which I think you accomplish in a couple of the rooms. They are complex enough to make me forget what the other forms of the room were and how to navigate them. Well done.