How to score high in Christmas gifts

Christmas Gifts is one of the more interesting games on Novel Games: it appears simple, and yet, takes some degree of skill to score well in (i.e. beat the 10000 points most people have). My method is exceedingly simple: fire copious amounts of gifts at each house (aim slightly above the house to get the bonus). Also, take shots at each house you can, and fire around 5 gifts towards it. With this method, I've managed to get 44390 points before (on July 11, 2008). Hope this method works!