Nice concept. Took me some time to get into it, but after I figured out the controls and how the chain works, it was pretty neat. I would make the transition between levels a bit smoother. When I collected all these plates, it felt abrupt, that I suddenly couldnt move. Fade out the movement slowy, Pop out the enemies, transform everything to a brighter color. Something like that maybe? Dont be a monster anymore, but become your original form again (maybe an animal or something)
The water shader look really nice.