The platforming wasn't actually too bad! A couple notes on improvements would be there should be a restart or death box outside of the playable area, or no way to get outside the playable area. I fell off the map the first time and had to restart the entire game. Also the acceleration felt a bit off? santa started super slow it almost gave me the impression he was being held back. Not a huge gripe I would just make the movement snappier. 

Good entry! I loved the dog and wish I saw more of him because that is a steller pixel art version of max.

The idea itself is quite cute. But sadly I had a few issue regarding the controls because I dont have arrow keys xD A and S works for walkinf but W doesnt for Jumping and it feels a bit off that I cant shoot while walking because walking is what I have to do to keep the momentum. I also didnt get how to pick up presents I just did sometimes on accident and I feel like i need to press something but I didnt know what.  

I think you should try to make a build that´s playable in the browser next time, because without the bugs the idea is sweet and fun but people just tend to not download demos in game jams. c: