First thing's first.
Beaking. Off... Perfect.
Now on to the actual review. The writing: Very good. Takes the "My First" theme to THAT level, but does it well. It's something I can get down with. The whole Yoda scenario didn't sit right with me at first, but it's funny to an extent. One problem, however. The mental institution and voices in head idea doesn't really fit for me. It feels as if there could have been a different way to present the "first" idea, yet there's not so this is the best option. It's hard to explain, but anyway, good job on that front. I enjoyed the ambiance and sound effects. Each piece of music fits each character presented and gives more tone and feel to these characters. On that note, the characters are varied and actually feel different. Nice work. Now for the meat of this whole audio burger, the (voice) acting. You've put emotion and feel into these characters and made it work nicely. On a technical front, however, it sounds... "off". It's as if you were speaking away from your microphone slightly, it just doesn't sit right in my stomach.
To conclude, you did good work. The voices fit, the writing was excellent, and it was overall done well. Needs a bit more work done though. Keep at it.