Really cool concept! I only really have one major gripe with it.
Avoiding Cobb when he has all 3 detection types is incredibly inconsistent. Usually, if he spots you, you're just dead. Sometimes though, he seemingly gets confused and stops. It doesn't feel satisfying to escape, it just feels like you got lucky.
Other than that though, fun!
There are strategies to try and escape him.
SEE: Stay in the darkness when he’s nearby. Check the eye icon. He will chase the last position you were in the light.
HEAR: Don’t move much when he’s nearby, check your sound icon. Breakers are so loud that he can hear it from across the map.
SMELL: Try and make big laps around the map when exploring. This is one of the hardest to deal with, your best defense is distance.
I agree that it gets maybe too difficult when he has all three senses though. Some rule combinations also make the game much harder, such as FREEZE + SEE.