Hey guys when you are on Astro Barrier. You can get to do secret levels. This is how you do it. When you are on Astro Barrier and you beat a couple levels you will see the instructions where they show you to shoot the orange square to make the orange box disappear. Shoot the square and the box will go then shoot the green ship (green circle). Keep on shooting it then you will see a blue ship shoot the blue ship and you will get to do the secret levels. Good Luck!
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