unrelated to the sprite, but the logo, branding, and especially the font needs to be improved. Also the video editing. Sorry, I just /had/ to say it. Plus the general typography/design concepts. For example at 0:18, you could have made "introducing" smaller and less emphasized, so you could focus the viewers on the game title. The art and sounds are really great, however. The animation of the sprites could be a little better. Transition between expressions look awkward, it could be improved with a simple fade transition. The sprite itself is really great, though. Nice job.