You are Father Christmas (Santa Claus) and every time you fly or jump past a Christmas tree, you need to hold on and switch it on. Once you’ve reached the correct take-off angle, jump to the next tree, so on the way through the Christmassy snow mountains, one Christmas tree after the other lights up, accompanied by a tone of Jingle Bells.
The higher up on the Christmas tree you land, the faster it will tip. If you jump too low, the tree won’t tip at all. Instead the Delk comes, and it likes to eat Father Christmases (Santa Clauses) / Christmas women. So, get to the tree top to be able to quickly jump to the next tree.