This series is comprised of five 3 minute episodes, closely based on the classic video games.
there is no voice acting, and the story is effectively told through movement, gestures, facial expressions, and music.
I feel that the first episode achieved the perfect tone for the series. it was reminiscent of Sonic's first cartoon outing; 'adventures of sonic the hedgehog'. his 'attitude' was fast, playful, and cheeky. while dr robotnik (or eggman as he's also known) was an intelligent villain, he wasn't to be taken too seriously. environments were colourful and the light plot didn't drag.
unfortunately as the series went on, it became violent - with too many characters added to keep track of. coincidentally, it mirrored exactly what happened to the game franchise after the original title.
if this series is to develop into anything bigger, I would suggest keeping things simple with a maximum of 3 characters (ideally sonic, tails, and robtnik), light with no fight scenes, fast, and most of all, fun! take cues from the first episode.