This is a pretty good talk on how to make such a simple UI be fun. Letterpress does a lot of it... http://indiegames.com/2012/10/video_is_your_game_juicy_enoug

This is a pretty good talk on how to make such a simple UI be fun. Letterpress does a lot of it... http://indiegames.com/2012/10/video_is_your_game_juicy_enoug.html http://indiegames.com/2012/10/video_is_your_game_juicy_enoug... Also, multitouch! Even most jigsaw puzzle games on iOS are inexplicably limited to a single finger. This attention to detail is amazing.