Start the ball two clicks to the left, which sometimes dislodges the top-left capsule.
When the ball is moving fast, just keep making contact with the ball in the center of your paddle, and send it to the top of the board using either the left or right channels. Once the ball starts moving slowly, then you can worry about clearing out the rest of the level.
When the bricks have descended on this level, the long center column of unbreakable bricks can make it difficult to move the ball from one side of the board to the other. I suggest attempting a slightly angled shot that bounces off the side wall, off the top wall, then off the top of the “arms” sticking out left/right, before hopping over the center column. This often take a few attempts. If that doesn’t work, try a sharply angled shot off the side wall, but be careful because the ball will be difficult to control.
If you grab a Gun, destroy the three lowest unbreakable bricks from the center column. This will give you the option to switch sides of the level by going under the arms instead of over the top.
I don’t understand what the category “ammo” is. How do you get “ammo” and what do you do with it?
When you get the Gun capsule, you get 3 bullets or ammo. You can shoot the bullets using your spacebar.