Simply enough, all you need to do is get to this specific level.

Make your way outside and jump from the ground to the doghouse to the roof.

Once on the rooftop, Tattletail will say, "Me know what you did!" making it obvious you aren't meant to be there. You will need to find and cross the fence that divides the porch and the driveway/backyard.

You now have access to places previously locked away from you. Have fun!





...Buuut in order to get the ending you need to travel far and wide to the ends of the earth and jump right off. Enjoy!