Visceral and evocative. The subject matter makes me uncomfortable and the dynamic audio (whale heartbeat?) reinforces it.
I'd love some indication of when I will starve. Is it just a set time since I last fed on the whale? Does boost use more energy and thus starve faster? How much blood am I sucking when I latch onto the whale?
I wasn't sure if there was a surface of the water. The ocean is very bright; after swimming around a few minutes straight up I was able to notice waves, but I think they're not actually reachable.