I can’t wait to see this world as an official addon in the game. But you should pay some attention to “A seemingly abandoned Igloo“. The first checkpoint is badly placed. When you respawn at this checkpoint you keep dying until you have lost all your coins:
I’m also not able to beat this level because you can’t fall through the semi-solid platform at the end (this is not possible in the android version, too). Am I doing something wrong?
Another point: “Mineshaft” and the forest island are a bit offside on the worldmap. I don’t know exactly how I feel about this.