Good Idea, but work on it
This is a good play on my favorite explanation of how Santa would hypothetically get all the presents to the good girls and boys in one night. Simply shoot them into the house with cannon. What I would do with this game is decrease the speed at which you travel, or possibly a variable assigned to a key. The graphics are decent I would try to create a better display of your score. Create a side menu. You could make it able to pause the game. And keep on rocking. Good job for your first game.