This should have been the hardest trophy in the game, but instead, it's quite easy. During the start of 'Zoom, Pow...', which is level 7, your objective is to reach a spaceship, and you will notice a timer appear which means you have to reach a higher level before it runs out. However, if you don't get there in time, you will return to the start of the level, but the points you gathered will remain. So with no penalty what so ever, repeat this process until you get 500 000 points and the trophy will pop. You don't need to finish the game in order to get this trophy.
Note: You don't get too many points during the part I described above, so during the first 6 levels, you will want to get as many points as possible. Make sure you do really well on level 1 as you can get more than 100K points on that level alone. Keep in mind that each time you use continue, you will lose 5,000 points, so try not too die to often either.