In the format of arkinoids. Try to get the lowest score possible while breaking all the blocks. Score is accumulated through time and by picking up special slow power-ups and by letting the ball hit the bottom wall. Time is deducted by picking up purple speed power-ups, green tracker power-ups, and blue extra-balls. Try beating the score 6322. Left and right arrows control the paddle.
Nice idea to make pong in 3 dimensions and make you play pong inside a tube.
Cons
The ball doesn't change in size when it is coming closer, so you can't tell how far it is at any given moment. This makes playing impossible. The game tries to show you current Z-coordinate of the ball by drawing projections on the tube's walls, but with constant size of the ball this makes no difference. Also, the paddle is only controlled by the arrow keys, and not by the mouse.