A very enjoyable game!
Personally, I only lacked these little things in the gameplay:
1) I think it would have been possible to make the net and the Grinch two different objects, so that when the Grinch turns, it stays in the same place and the net moves to the other side. I think this would add integrity to the gameplay.
2) Perhaps it would be worthwhile to have the anvils hit the Grinch itself, rather than the net. Or both the Grinch and the net. Kinda ruins the immersion when the anvil goes through the character.
Otherwise enjoyable gameplay, kept me going for half an hour)