Letterarium is an addictive word game developed by Motionshift Studios. The game level begin with very easy three letter words, but quickly ramps up with longer words and various challenges such as bombs and mixers. It features a real-time physics engine for dynamic interaction and beautiful steampunk graphics with appropriately mechanical sounds.
This game was written entirely in xCode 5 for iOS7+.
Presskit page for LETTERARIUM is here.