Fair enough.
First of all, I can't really say I liked it. Then again, you're just 10 years old and it's your first submission, so I'm going to rate it accordingly. It was also really sweet that it was dedicated to your brother, although it was a bit sick that you put in the "XXXPORNXXX", as you're 10 and you rated this "All Audiences".
The animation was... quite non-existent. The lip-syncing was quite okay, but the drawings and other animation, brace yourself, sucked. Work on your art and animation skills, I'm sure you'll make something good and nice-looking.
The shops were a nice addition, but the fact that not everything was coloured and I could often see the background instead of an alley or something was a real bummer.
The music was not so good, except for the last one, in the credits. You could've improved the export settings so the sounds sounded a bit better though, you could've made the frames per second higher too (16 to 25).
Most of the humour was quite childish, although the "Disc Error" was quite funny.
If you were a bit older, I would've definitely been more harsh and probably would've given you a 4/10 and an 0/5. But you're not, so practise and I'm sure you'll make something good.