Easy:
http://gamestolearnenglish.com/basketball/
Difficult:
http://eslgamesworld.com/members/games/vocabulary/hangman/Present_Simple_Hangman1.html
PRESENT CONTINUOUS:
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http://home.nordnet.fr/~rmaufroid/pupitre/houses/inthekitchen.htm
http://eslgamesworld.com/members/games/grammar/present%20tenses/present%20progressive%20hangman.html

http://www.learnenglish.be/gr1_prco_ex1.htm
http://www.learnenglish.be/gr1_prco_ex2.htm
http://www.learnenglish.be/gr1_prco_ex3.htm
http://www.learnenglish.be/gr1_prco_ex5.htm
http://www.learnenglish.be/gr1_prco_ex8.htm
SIMPLE OR CONTINUOUS??
http://eslgamesworld.com/members/games/grammar/present%20tenses/present%20progressive%20hangman.html
http://www.swfcabin.com/open/1316627373