This is what Christmas is all about!
The games got a wonderful charm about it with a retro look and feel but you can tell the dev has put some effort into it as it's pretty intuitive while allowing for harder challenges as the game progresses as you try to get perfects along the way.
Save yourself some money buying an advent calendar and get this instead, do what I'm doing and try complete a level perfect each day running up till Christmas.
I'm pretty sure it said on their App store description that they plan to add updates, so dunno if that's going to be new levels or something, either way, for 69p it's fantastic :)
I'm always keen to support small indie developers like this one and hopefully they can expand upon their ideas, who knows maybe they'll be the next Angry Birds or Rovio.