The good:
As everyone stated the art was really nice. The puzzle was not so intuitive for me to figure out, but I think the idea of how to figure out the stuff was good. I don't think I still understand how to pick out the organ. But maybe that's a me problem and not the game.
The bad:
The controls were quite frustrating. Sometimes I would accidently take the wrong organ and have to start over and grab the book again. My suggestions for that would be to make the hit boxes more accurate. Also making it so that if the player already has the book, they don't have to get it again.
Same thing when you have already found 1 body, it wasn't fun having to go through the steps.
Another thing is that going back to the lab table from the body view was difficult. The instinct I had was to click on the bottom right since the lab should be that direction based on how the game transitions have been. Unfortunately getting the click to the lab doesn't always register and I am clicking several times to get to it. My suggestion there is to add a designated button or area for the navigation.
Overall:
I think it was a cool concept, you implemented the theme well. The controls killed the enjoyment for me unfortunately but those are easy fixes so I expect this would be a fun one after those are addressed.