Muter footage: Santa will send himself a message or a letter called game over. When Santa gets this message he will then say "your score is" for 1 second. Then for the second say block, go to variables and drag the score block into the first bubble of the say block. This way, no matter what the score is Santa will always say the score. Both say blocks can be found in the purple looks section. The number in the say blocks will determine how long the speech bubble stays up on the stage. As for the error with the score, Santa said the game was over because my score was -10 and the green flag that controls the set score to zero didn't have a chance to reset the game fast enough
https://scratch.mit.edu/projects/922033922 (This is the starter project, it includes the custom characters and backgrounds, and some basic code)
https://scratch.mit.edu/projects/922007368/ (Regular version of this game)
https://scratch.mit.edu/projects/921275794 (advanced game link, this version has two houses and they change speed. The green house the player has to get the gift on the chimney and not just the rooftop).