I really enjoyed the art and attention to detail (camera movement, sounds and other small things). Other things like animations and UI feel really satisfying and good. One issue I had was that the gameplay got very quickly repetitive and I was easily staying at range from the anvils, so I wasn't getting hit. The hardest challenge was jumping over Santa, as every time he got bigger, and at around level 5 I was finding it hard to get to the other side.
Overall great and satisfying game, with really good Art, animations and UI.