Good work!! I like the colour choice of white buttons (snowballs) to red as they are Christmas colours, they stands out in the scene!
Love the cute reindeer's face expression and the horns. Good colour choice, the character look great with the blue colour.
Unique positioning for the game buttons.
It is also good to see the feedback of changing the button colour (when hovering over).
I only noticed that it might be good if the buttons still showed the text.
Looking forward to playing your game next!