hocus Puzzle Game for iPhone
There are plenty of fancy action and adventure games available for iPhone with great graphics. Not everyone needs those though. hocus for iPhone is a fun puzzle game with tons of levels to keep you busy for a while. It consists of illusion puzzles with a minimal design. You can create and share your own levels.
The puzzles are particularly entertaining due to their impossible look. You are going to need an iOS 6 or later device to get started. This game is available for under $1 at this time.