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general strategy for getting lots of space stars (or at least how I got it): Max out upgrades. Pick up plane, go to bottom left corner, then throw quickly towards the top (try not to throw backwards). Immediately hold left and space, so you should fly close to straight up. When you have about ~1 bar of fuel left stop using engine. You should stall. Use emergency stall, now you're flying horizontal at some crazy high altitude and you can use the rest of your fuel to aim for stars.
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The game shouldn't crash when you throw an airplane backwards. I know I just poked my eye out, but that doesn't mean the universe will explode.
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Everyone said don't throw it backwards. So first thing I did was throw it backwards. Second thing I did was restart my browser.
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throw low upgrade the windmills and birds to give you a boost. that way you hit the windmills and not waste the boost
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There was Easter egg in here... I think it was Easter egg but... when I just got fall down and crashed too hard... I got transformed into penguin... well I think this reminds me Learn to fly game... lol... click + if this was happened to you too!