Hm? I don't understand, although there are ways to get stuck unfortunately. I just don't think like that.
Not sure if You know this, but You don't have to always get the star, it just gives You points. And You won't be able to avoid elements after few screens, it gets more difficult every passing screen. And You get points for destroying obstacle, so its better to do it.
Look at the cover art - how are You supposed to avoid obstacles here?