Hi! I'm French but live in Canada, and I've wanted to try Adventuron for some time now, so this jam is the perfect occasion! (Although to be totally honest, that sweet Raspberry Pi helped convincing me! :p)
My game won't be strictly speaking Christmas-themed since it's about saving a Winter Solstice celebration, but I hope it'll contain enough "Christmas spirit" to qualify. :)
I'm almost finished coding it. So far my opinion on Adventuron is mixed, there are things I like and others I like less, but globally it's quite pleasant to use. (I'm more an Inform 7 person myself, so I'm likely a little biased.)
The hard part will be the graphics (I'm not an artist), and I'm still thinking about what I will do.
Anyway. I'm looking forward to playing the other entries!