In its time, Krakout was one of a batch of Breakout-derivatives which clogged up the market, was it last Christmas? Still, it must have been one of the best, because it won an SU Classic (yay!)
The big gimmick in Krakout is that it's sideways instead of vertical. Other than that, you can play the game if you know how to move a joystick up and down. The patterns of coloured blocks become more complex as you clear level after level; there are also floating aliens which deflect the ball, and token blocks which give you special abilities.
Bonuses include Glue, so the ball sticks to your bat; Bomb, which destroys blocks adjacent to the token; Shield, which creates a barrier behind you so you cannot lose a ball; Missile, which gives you a single all-destroying projectile to fire; Slow down, Double speed, Dual bat, Expand, Extra life and so on.
To further tailor the game to your taste you can play left-right or right left, have an inertial or dual speed bat, and set the bat speed from 1-9.
Fab fun, well worth the money, and the ideal thing for whiling away the Christmas holidays.