Okay, bought and played some of it.
Thoughts and ideas...
1) A ground smash move that cuts off forward momentum would be cool.
2) As would a magnet upgrade.
3) She handles a bit tanklike-I get she's going fast, but it'd be cool if she was a little more nimble and less weighty.
4) Tutorial didn't include buttons-I had to exit the level, check the controls, and go back in.
5) Is fun!