Nice responsive game with punchy sound and a nice bit of juice.
I''d say the first bit was a little too hard as I felt myself forever getting stuck on those first few spikes even after passing them a number of times. Buuut I can see that being part of the whole simple rage-game kinda thing.
Overall you've really nailed a nice simple central mechanic that'd port well to things like mobile, and I can see doing really well there!