After beating yin yarn, you have access to both dream land and patch land. Go back and forth between the worlds and finish the unopened levels of the game.
To defeat Yin Yarn you have to defeat the second Fangora he makes first, then the second Campari. Needles and a Curtain: Yin Yarn will drop a curtain and these weird sewing needles will appear. They...
At the title screen it will say 1-player or 2-player, to start 2-player during the game, join a minigame or a level and it will ask 1-player or 2-players. To end 2-player mode, simply do the same...