Caveman is a hoot!
http://www.cavemanscrib.com/
Whoever conceived this little game was really funny and smart.It's interactive,you can wander around the entire place,change the music,read e-mails,etc.
Just look for the things that "light" up when you hover the mouse on them.
My fave was to start the microwave and blow out the lights,LOL....
Then go interrupt Cave's shower. He has some funny lines in there!
Available @ 