Not one of your best, but still fine. The best part is probably the animation. That one joke about running around the whole world was great. The buildup was really funny. I don't know why the girl slapped him at the end. Was she supposed to be his girlfriend?
They didn't seem like that at first. Most of these characters don't have visible teeth anyway. Well, you could see his gums here. The colors are good. You have still done better.