If you'd like some honest constructive criticism I'd say the biggest issue I saw was a lack of energy with the cat winding back just before the jump. Looked more like he was leaning than preparing a giant leap. During and after the leap look decent, though.
Thank you for the constructive feedback! Now that I think about it, I could have exaggerated the beginning more. I've got another idea now on how to draw the cat leaping. I'll have to try that next time I open up Flash. Thank you!