To get this achievement you need to beat three laps of endurance mode on normal difficulty. I've found it doesn't really matter which song you use (I just used the first on the list) as long as you stick with your chosen song. After a couple of attempts you'll start remembering how it goes. The bar in the upper corner could be considered your 'health bar'. If it drops to nothing it's game over. Hitting the rockets will make this bar go up and missing them will make it go down. All you have to do is complete three 'laps' (shown in the bottom left corner) without it dropping to zero, which depending on the song should take around 5-6 minutes. Beware though - the rockets do speed up considerably. I'd also take the rocket markings with the arrows on them, as in a pinch its easier to be able to just slam the way the arrow is pointing rather than taking the extra half second to think about which button is blue on your controller! Good luck!