to get 40000 on wish you a marry christmas:
(i tested and it worked... it took me a while ¬¬) put the notes a, s, h, j, k
an then practice a lot.
you'll notice that you can only miss some notes at the start because you MUST have the x4 multiplier ....
when you charge the snow power activate it... be careful! if you miss one note you'll have to start all over again .-.
it's hard... but its wort 30 points ^^.