This was a really nice platformer!
There often are platformers submitted to game jams, but most of the times the controls are a bit too smoothed out and they don't really feel snappy. This one does. The controls are really on point, so the character moves really precisely. It was fun to play with keyboard and also with a gamepad, thanks for including support for it!
On top of this you had a really good level design. They were hard, but not frustrating. I did die a lot of times, but that is just a proof of me being bad at computer games xD
I really liked the small signs with hints, it really helped me at a few points.
The art is amazing. It is "simple" and really cute. With simple I mean that it has a clean and simple look to it. (I do not mean that it is simple to create these beautiful pixel arts. I know how hard that can be). I liked the fact that you embedded the game in a small story! I would have loved a few back-references to the story in-game (though that is really nitpicky).
As you noted in the description, it could have used some music and sound effects. I put on some cosy christmas tracks while playing and had lot's of fun.
Especially for a solo submission this is top tier! Would love to see more levels in case you want to work more on this in the future.
One small minor note: There is a bug where you can fly off limits. When hooked onto one of these moving things you can jump up into a tile above the player. The player then is stuck. Trying to perform roles will push the player up. But I had fun discovering this :D