This is version two of Powernoid, the Breakout clone with powerups inspired by Megaball for the Amiga!
I think the update log from the readme says it all, so I've quoted it here.
Updatelog is big :)
Cheers, Art.Powernoid V2 (27/11/08):
Change to multiball powerup behaviour, the ball now splits in two when a player gets this powerup.
Player no longer loses a life if the multiball powerup is active, and one of the two balls is lost.
Difficulty is increased by slightly speeding up the ball movement compared with the first version.
Program keeps track of highest score with an encrypted save file.
Added extra type of brick that causes bricks to move down every time the ball is hit with the bat.
Extra life can now be gained by passing stage 15, and any other 15 stages after that.
Changed some characteristics to give the bat some control of ball direction as in Windows DX_Ball.