I'm making a game for iPhone and iPad w/ Cocos2D and Box2D. I scale the size of square objects ("blocks") using a pixel-to-meters ratio depending on the particular device. Can I stretch or shrink the textures and CCSprites as well? I was considering having just one "blockImage.png" file and scaling it up/down depending on the device.
The alternative is having 2-3 sets of images for iPhone, iPhone 4, iPad etc.