simple
+ Nice sound effects, relaxing music
+ From what I've seen, good word database.
+ Clean graphics
- There are too few constraints to the game to make it really interesting: the only limit in the words made is the random letters, otherwise you can just think out where to place what because there is no opponent to adapt to (like with scrabble). Also little variation between the levels.
- difficulty could be better: as a non-native speaker I often had over double the score needed to pass (also easier to upgrade if the random factor becomes less important)
- Please add in the instructions that you have to start in the center or get no score for perfectly legitimate words.
- A way of dragging back the letters if you made a mistake?