Animation and voice acting are good. They communicate well how the character is sleepy.
The character's expressions and timing are well done and help tell the story.
I also use Flash and Swivel. This is a way to make the audio sound clear.
Go to your Properties panel and click on Publish Settings.
A1 - Set the JPEG Quality to 100.
A2 - Click on Audio Stream/Audio Event, and please, select RAW Compression.
A3 - Turn off Convert Stereo to Mono and set the sample rate to 44 kHz.
B1 - Once the audio is imported, go to the Library, right-click on the audio, and select Properties.
B2 - In the Properties window, set 'Compression' to 'RAW' and choose a sample rate of 44 kHz.