Key Mouse is a hilarious game. As its name indicates, the mouse is powered by keys, so in the game, you have to move as fast as you can to get keys in order to keep the mouse moving.
If you're slow in getting the keys, the mouse will not survive and the game is over. Your final score is equal to the total number of keys you're able to get.
Enjoy the funny game play and the interesting music, but most importantly, beat your opponents in getting the keys!