Really quite nice! I like the level pacing, while the checkpoints are frequent, they're still challenging enough for a casual platformer. I also really like how each new segment is something to look forward to.
A toggle to turn on-off the CRT filter would be nice. The snow shader itself was very immersive and came across as a feature, even as it kind of makes the gameplay hard---it feels like how snow would be in a real blizzard. I likes.