Well, my pet sleeps while entering into the house, the status keep saying upset, and he chases the ball in the house!!!

when I've download it it only has:lpp_0s5.prc and lpp_lores.prc and license.txt and instructions and lpp_readme_im

i play it i download it and it not showing up on my desktop

Mine plays on the house too and on the fence. And he goes to sleep out side the house on the ground.
Is this a glitch?

Yes, it's a harmless glitch.

And what about the upset forever state?

MABY HE IS SLEEPY

for the upset forever state ...: maybe try brushing pet ALOT ...
that seems to make the lpp's I've had happy ...
hope that helps ...