I think it would have been better if there was more variety in enemies. They seem to exist only to slow you down rather than present a persistent threat.
The names of the songs used in the games can be found by clicking the "music" button on the main menu.
For those who don't want to look:
1. Gorillaz - Tomorrow Comes Today
2. Beck - Cellphone's Dead
3. Death Cab For Cutie - Brothers on a Hotel Bed
4. Gorillaz - El Manana
5. Spoon - I Turn My Camera On
I second lethargic8's strategy, though I might suggest a revision: It might be helpful to alternate between preserving blues and preserving yellows, as it can take quite a lot of effort to charge the yellow special.
 "Ninja Run"){kind=icon}
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 "Mushroom Madness 2"){kind=icon}
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 "Robot Wants Kitty"){kind=icon}
 "Record Tripping"){kind=icon}
 "GeoSketch"){kind=icon}
 "Bloody Fun Day"){kind=icon}
 "Cursor Chaos"){kind=icon}
 "Cell Warfare"){kind=icon}
 "Globetrotter XL"){kind=icon}
 "Shopping Cart Hero"){kind=icon}
 "Mastermind: World Conquerer"){kind=icon}
 "Smoking Kills"){kind=icon}
 "Minions"){kind=icon}
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