Nice work!! I got a high score of 260, the concept is really creative and is very fitting for the theme. The coffee is also a very good edition to make sleep not entirely inevitable (you could even make it a hot chocolate or something for a wintery feel!).
I did encounter a bug where I could stand still and the snow men who already damaged me wouldn't damage me again (this can be fixed pretty easily though I'm sure). It'd also be nice to have some sort of heal powerup.
But overall the concept and execution is great for the time you had! Great job again :)