Got the impossible badge. Managed to get 110 in Dark world Busta Line and 153 in Light Chromatic Scale. ~11 hours, as I lost my progress half way through. Good luck to anyone who wants this; it's a really fun challenge.
Just got the heavenly badge. Final boss is a bitch, but I managed to find a strategy. I used No Legs with the Shooting Star, the 5% Attack and 2 extra bomb cheats, and the One Heart handicap. Dodge waves 1-5, bomb waves 6-8, beat wave 9, and bomb wave 10. Restart if you mess up 1-4; if you mess up 5 you may be able to recover by perfecting wave 10.
Good Luck.
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 "Bullet Heaven 2"){kind=icon}
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