Crossplatform iphone / Android 2D game engine

I want to write a 2D game for iPhone and Android. The thing is, it's not a typical arcade game but more of an app with background services / push notifications / google maps interactions / contact list reading. Is there any crossplatform engine that let me use all those features without trapping me completely in th开发者_StackOverflow中文版eir framework ? The game is not CPU-intensive and doesn't really require openGL ( it's more sprite and tweens based ).

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http://www.anscamobile.com/corona/

I haven't tried it but you can take a look at it.

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If you can afford, Marmalade (a.k.a Airplay SDK) is what you want.