I appreciate the ball being "slow" (could be even slower for all I care... great idea: having the ability to use slow-motion during the game) One of my main gripes that prevented me from truly enjoying the Breakout genre was mainly the ball speed, too hectic and stressful for someone that just wants a casual experience. All the effort of designing all the levels goes to waste if 80% of the players are only able to reach level 2 or 3 at most before quitting in rage. Also, another aspect that I really loved about it was the cash/upgrade system, I wish there were more games out there with a credits/upgrades system like this, so much potential yet to explore in many genres. Upgrade system expands replayability factor exponentially.