Suppose that in Wishy Washy, Petunia succesfully showered every last bit of her clean, instead of dying.
And that in Ski Ya, Wouldn't Wanna Be Ya, Flaky got her foot bandaged and made it home safe and sound.
Then they'd be tired of the incidents, and they'd proceed to catch Z's.And that's exactly the situation in this Flash.

Instructions are on the first page... you can hit left to show Petunia, right to show Flaky at any time, as well as the up and down arrow keys to change darkness.Also, watch what happens when you press Space.

Petunia and Flaky (c) MondoMedia
(Room designs interpreted from happytreefriends.wikia.com/wiki/Locations/Houses)