Not bad for yourf first time
One big tip from me: get a good audio program and lay out the entire sondtrack before you do the toon. Then, Place the audio as one big clip across its own layer in "Stream" mode, and create the cartoon along that. It's ok to do this scene by scene as well, so long as it's stream mode. Stream mode will keep the graphics focefully in sync with teh audio, so even on slow computers the audio won't finish before teh animation does. On slower machines, they just keep talking after the sound is done and the pacing of the toon is messed up.
Just my $0.02, nice job for a first toon!