Gets you right into the Christmas spirit! It has cool, yet simple animation and a good music loop. The DDR ratings such as "Not Bad" were also good. If I had to make suggestions, I would work on the timing of the present drop. Now I know presents won't fall straight from the sky, but the curve could be improved. This also leads me to more ideas: Make levels. 4 presents or less busted per level would have been easier to achieve. As levels got harder, you could do four things...
1. Continue to make the green zones smaller (which you did, Awesome!)
2. Make taller and shorter buildings...make it possible to crash/easier to crash. It would up the difficulty.
3. Change wind dirrection. If you wanted to make it really hard, put a wind sock at the bottom- show the wind dirrection. Then, the presents dropping would be easier to predict where it would land. This would also get harder...start flat, then add wind resistance or assistance.
4. If you made levels, you could go around the world...Each level is a different part of the world...building variation/scenery change.
This game was neat, but not extensive. If you wanted to make a longer project, I think the 4 suggestions I gave could be of use. Great job!