Just in case if you're wondering what exactly the World 1 Skip is and how to replicate:

It's a bug that allows you to leave the level while unlocking the next world. This is only possible for the first world but saves roughly one minute.

Just open the game and you'll have the WoodleTree Configuration window which allows you to change your key bindings before playing, head to the tab 'Input'. No matter whether you play with keyboard or gamepad, what you want to check is your BackPad360 config (scroll down a bit). It's the input that allows you to leave your current world and bring you back to your home.

For gamepads it's bind to your Back button - assuming you're using a XBox 360 controller or something similar - while for keyboard it's not bind so you need to bind it to a key which goes well with your key config. After that just start the game and there you go.

Additionally, if you're up for collecting berries for achievements or items you can use this bug to farm berries very quickly. The game remembers how many berries you were collecting the last time, and if you enter the level and quickly leave it afterwards the same numbers of berries will be added to your counter. It resets whenever you collect a new berry in any level.