yeah, looks cool, I imagine with a good soundtrack this could be fun (Although I realise you may have sound in already but my computer didn't load it in time)
had a weird glitch when trying it. the ship chugged around slowly on my rubbish laptop, and the spiky things seemed to just grow and grow until they were half the page. if I had to guess I would say you have them grow every x amount of seconds and disappear when the ship passes, ok on a quick pc, but could cause the glitch I had on slower pc's.