SpellTower for iPhone and iPad is a fun word game that adds a fun twist to the classic word search game. Instead of being limited to spelling words vertically, horizontally, and diagonally, you can choose your letters in any direction.
Specifically, if the next letter in your word is in one of the 8 surrounding letters, then it's fair game. Perhaps an easier way to explain it is -- any word that is able to be spelled by sliding over each letter, in order, without lifting your finger, is playable in SpellTower.
There are other little rules for scoring and clearing rows, but SpellTower does an excellent job of explaining them in the tutorial.
SpellTower has 5 different game modes. Tower Mode the most relaxing and pressure-free. You are simply given 150 letters and it's your goal to spell as many words as you can.
Puzzle Mode reminds me of Tetris. Each time you make a word, a new row is added and your goal is to prevent any of the columns from reaching the top.
If a letter has a small letter in its tile, the number represents the shortest length your word must be in order to use that letter. In Ex Puzzle Mode, there are a lot more of these letters than in Puzzle Mode.
Rush Mode has the same overall objective as the Puzzle Modes, except that instead of adding rows every time you make a word, SpellTower adds a new row after a set amount of time. This is by no means a leisurely game mode!
SpellTower is a very fun game. I've always had a slight aversion to word games, because I'm typically very terrible at them, but I actually really enjoy playing this one. SpellTower is the best word game I've ever played.