Two examples of gameplay over graphics

OK, so it's holiday season and I've been idly checking out a few more means of wasting time on my iPhone. Compared to the early days of mobile gaming, modern titles often require all of the graphics resources behind them as desktop titles. But I was struck by two examples (both from the same publisher) showing how the graphic simplicity of the mobile games of yesterday can still work in an iPhone game. Pocket Planes and Tiny Tower are an example for small developers of how games from small teams whose development is focussed primarily on the strategy of the game rather than fancy graphics can still work!