I really like the core idea here. Using the croak like Marco Polo to locate the next frog while knowing the snake can hear the same signal is a nice little risk/reward mechanic, and everything ran smoothly for me.
I think the main thing it needs is another layer of decision-making. Right now, once I understood the loop, there wasn’t much room for different strategies or player expression. Things like decoy signals, multiple possible targets, or different collectible/resource types, maybe frog souls vs. lantern fuel, could make each search more interesting.
I only ever managed to get 3/8, but I had a fine time with it. The premise is definitely there; I’d just like to see a few more systems built around it.