Milking you for every last cent? It's a 99 cent game that has gotten more content updates then pretty much every game out there. If this were an Xbox Live game every single level update would be a piece of paid DLC.
I've no problem with paying the 99 cents, thats great value for money, its when they then release an overpriced iPad version for something like $5.49 when they're perfectly capably of developing an app that's optimised for both. None of this having to double the screen size and becoming pixelated on your iPad for an iPhone/iPod only app.