Well it wasn't bad, but it could've been better all around. The audio department needed the most work however. The voices were fine, just the cat's noises and the almost complete lack of audio in the beginning was annoying. The mouth for the old man was also off of his speech but he made up for it with his awesome voice. The music when the Zimmerjet 4000 showed was nice and I liked the little 'Goggles and hat not included' thing hidden at the side bar, made it feel like a real commercial. You're on the right track, just need some work on a few things.
The joke wasn't to funny for me, but everyone perceives comedy in a different way.