OK, but has problems
I'm not all that familiar with Sonic and co, but this seems to be a lot like the super mario bros Z series.
Anyhow, the cursor is not visible during the movie itself, making it very difficult to hit the advance buttons. I would recommend making those buttons in the future a bit larger to more easily hit them.
Also, make sure that buttons with text are active on the entire surface, not just the text.
Finally, make sure that the credits are at a font size that is readable, especially for those with higher resolution moniters.
It was a good movie, though.
-DK