Not enough instructions.
I worked out that I was suppose to keep up the circle things, but that seemed to be near-impossible.
Each time I passed an apple, whether I collected it or not, I'd lose a circle. I worked out that I could collect the circles but doing so was far too hard... and the game doesn't seem to change at all.
Have the instructions explain everything properly and make the game start off easier and get harder.
Stay funky,
Bez