Gotta say, I had a blast playing this. Really took me back to the good old games from my childhood.
The intro was great! At first, when I saw one of the snakes avoid another, I thought they were running autonomously. Then I saw what you were doing :)
Smooth controls and no problem playing with a trackpad. Nice music (stage 3 is still playing in my head). Cute 3D models. Would play again.
I agree that the rings on stage 2 are kind of hard to see, but after a while you get a feeling for where they should be. One thing I would like is a sound when picking up items on stage 3. Loved the animations of the apple's face on that stage though :)
(Btw.. could you pick up other weapons on stage 3?)