That's exciting you plan on making a mobile game out of this.
To me the good is that its simple and effective. The art is perfect. You could hand craft tons of levels fairly quickly. Its easy to imagine adding new enemies and challenges to it as well.
My feedback would be, controls might be hard to do on mobile. You might need to change up the paradigm a bit there. If you plan on having it track the finger that might end up being too easy giving how the game is currently structured.