Word puzzle Greek Kremala

Kremala is a sophisticated word puzzle app based to the Greek game of kremala, played by pupils on a piece of paper between school breaks. This electronic version of the game presents the 1st and last letters of a word and expects from the user to find the whole word and win.
Kremala uses points depending to the number of the letters of a random , inside a group, word,
to grade the successful player attempts.

Groups of word domains can be set by the player.
Player can set level of difficulty.
User can change player name.

The 10 top player scores will be stored and displayed.
The user may change category of words to be solved
and level of difficulty.