I can't understand the theme
We have 2 themes. The first one is about choosing a game that doesn’t fit the winter holidays, maybe a horror game, or a shooter, or something not festive at all, and add winter festival elements to it (Yule, Christmas, Hanukkah, Saturnalia, whatever you prefer).
The second theme is about making a game in which having what normally would be considered a great super power is causing trouble instead (say the PC flies, but cannot stop going higher and higher).
Hope that helps.