I am not an expert in iPhone development, but I studied it and will try to make a chip at my 2 cents.
Yes, it seems that Cocos will be very suitable for what you plan to do, and it will certainly be able to do something like this Cartoon Wars. Plus it also gives you two options for integrated physics engines to choose from. Streaming Color Owen Goss develops the game using Cocos and vlogging experience, he sometimes comments on the problems associated with the physical engine http://www.streamingcolour.com/blog/ .
CoreAnimation, . , NimbleBit http://www.nimblebit.com/ (Scoops, Moon Drop) Quartz.
, , 3D-, . Zombieville USA ( http://www.thecareergamer.com/?p=513) , . , , Unie Unity, . , Unity Zombieville . , Unity Objective C #.
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