Make lines (either horizontally or vertically) of three or more characters of the same color to make them disappear and earn points. As the game advances the block falling speed increases. Making combos reduces the block falling speed.
Left/right arrows : move the characters block either left or right
Down arrow : make the character block to fall at maximum speed
Z : rotate the active characters anti-clockwise
X : rotate the active characters clockwise
ESC : back to main screen
+/- : to adjust the sound level
M : enable/disable sound