I love the rolling character animation - made me smile all the time.
In the beginning I didn't get it (was expecting the vines to snap on the top platform - becoming a rope or something...) but once I realized that I can change direction mid-air my little cute guy was climbing like a pro to a 200+ highscore. In that region, the highscore numbers and the time-for-a-vine number start to overlap - other than that, everything was working just fine.
I can second the suggestions TheoClarke was giving in his comment.