Yoshi's House is a simple bonus level, accessible at any time. Time is infinite in this level. Hit the information box for a message from Yoshi.
Beating the level
Walk off the screen in either direction.
Other uses
If you have Yoshi, get all of the berries and he will give you a simple mushroom. It's really only useful for the 1000 points that come from the mushroom. There are better places for this, though.
