I mean, it's Breakout, you can't really go wrong with the core gameplay. However, there is a variety of issues here:
Classic mode is mega bland, the default ball speed is annoyingly slow, you can't have multiple effects on the same ball (ie big+burning), there's no fast clear bonuses, the graphics are just simply boring, the level shake is terrible (especially if you have multi ball active), and you can lose life after clearing level. Also, could use more effects, such as sticky paddle.
GameplayAddictiveReplayabilityUnfinished