Not to bad but as an audition tape I think you might want to clean some things up. First I would make sure my head did not show up in the video.

I would also hang the back drape a bit neater. You stumbled a couple times on your lines. Do you have editing abilities? If you do you would not have to shoot the entire routine at once just edit it together.
Try to come up with some other actions you could preform. Would be great if you could get a prop rocking chair he could set in at some point. Other things you can do with your hand besides just bringing it to his mouth. Scratching his head to think maybe or cleaning out his ears.
You did good on the voice it fit the character and you stayed in it without slipping out.