The voices were funny

Overall good job... You seem to have pulled this together well. You're staying inside known abilities, and using what you have and know well. Sure, it's kind of basic, but there's also a nostalgic charm to it. The movements are consistent as well as fluid (not perfect, but no one really is) and the sound and voice sync up well. You've put in the effort to construct and tell a worth while short gag, and delivered.
Okay, it's not Shakespeare, but you have something publicly acceptable. It's with practical works and practice like this that you can grow and evolve as an artist and storyteller.
Summing up, good job starting small, and I look forward to seeing what you take on as your next project... The only words of caution I'd offer are "don't get too big too fast"... Bigger and more elaborate projects are great and all, but you can take your time and make your strongest growth just being steady about it.
You're getting there, so don't forget to breathe, relax, and keep on keeping on. :o)