Support Issue: Removing supports from the back of the penguin is hard and ruins the model. I understand maybe there's no much to do about it. You should straight out the bottom of belly and receiving part on the main body.

Other Issues: I can't get the pupils fit the eyes holes, no matter how many energy I apply, will try reducing them. Also with glue belly won't resist much attached to body, consider creating a hole in the belly and a corresponding pin in body.