Cannon Brick Breaker is a fun F2P game that nailed power ups

Super fun basic brick breaker.  But where they nailed it was with the powerups.  They are the only one that I have seen that have some real reasons to use premium currency for powerups.  Watch the video below to learn how they added these game mechanics to their game.

Powerups

Hopefully you checked out the video.  Their opt in ad placement and powerup usage is the differentiator vs other brick breakers.