Your goal in this game is to destroy all of the bricks in each level in order to proceed. Every single level has a different arrangement of bricks from each other, so you will never see the same arrangement of bricks multiple times in a row at all.
Some bricks will need more than one hit from your ball in order to be destroyed. Use Power-Ups to destroy them instantly. Random bricks will drop random Power-Ups or Power-Downs that will be descending down the playfield until they drop from the bottom edge of the playfield, which is when they will completely disappear from the playfield and screen alike. When 95% of the bricks are destroyed aka when only five bricks are left to destroy it, Next Level Power-Up will be continously appearing. You can either collect it to proceed to the next level right away, or you can ingore it to destroy the five remaining bricks on the playfield with your ball all by yourself.