Straight to the point: Double Decker is a 8×10 brick wall and a paddle tuned to 30% of the screen, playable in your browser right now. It is tuned for quick runs, honest difficulty, and controls that make sense the first time you touch them.
The ball never stops; you only steer the paddle and choose the angles. Power-ups drop from broken bricks - wider paddles, extra balls, slow-motion - and catching the right one at the right time swings a level. Here you face a 8×10 brick wall and a paddle tuned to 30% of the screen.
Nothing here needs a tutorial or a wiki. Controls are one gesture, the goal is one sentence, and the difficulty comes from execution rather than homework. That is exactly what a browser game should be.