Pros:

- Very original
- smooth gameplay
- frozen zombies
- Santa looks awesome
- rotating turntable and custom music
- Survivors' pic frames

Cons:

- not enough defib since it's easy to fall and die
- seems to be a bug on the mid-ladder. When i jump from it to go faster, it brings me back at the top of it.
- Staying on the sledge looks a bit easy to reach gold.
- When Santa goes out from the frozen lake, he does... nothing....

Conclusion:

That was some fun !!
Many great ideas given to details and gameplay.
I was expecting Santa either to be helpful or to rescue the survivors. That might be an improvement you could work on.
Thanks a lot for this unique survival map.