Ultra Pong

That's right--I've finally had some nerve to create my first Game Maker game. Due to this reason, don't expect anything amazing--I'm not relying on coding and graphics obviously are going to be....well....not good.
Here's the basis of the game. You have control of four paddles, and you must use them to keep a ball from appearing off-screen. Each time the ball collides with a paddle, 5 points are awarded. As time goes by, the speed of the ball will increase. Along the way there will also be things besides the paddles and the ball. Further below, this is explained in detail.
LIST OF OBJECTS PLANNED TO BE USED:
- Four paddles. Two are controlled left and right, and two are controlled up and down. They are used to keep the ball from going out-of-bounds. When the ball touches the paddle, 5 points are awarded.
- Ball. Bounces off of paddles and walls, awarding points when doing either. If it exits the screen, 20 points are lost and 1 life is lost.
- Wall. It appears every now and again somewhere on-screen. It cannot be destroyed. Remains on screen for 10 seconds. When the ball touches it, 1 points is awarded.
- Moving wall. Appears every now and again somewhere on-screen. It cannot be destroyed. Remains on screen for 15 seconds. When the ball touches it, 3 points are awarded.
- Bonus powerup. Appears every now and again in the center of the screen. It can be destroyed upon contact with the ball. Remains on screen for 3 seconds. When the ball touches it, 100 points are awarded.
And that's about it that I have planned so far. Please don't go telling me "THIS GAME IZ WAY TOO SUCKISH"--it's simple. I know it's not great. Give me a break; it's my first game.
If you have any ideas on other objects that can be used, please post them. I may or may not be able to use them. Furthermore, if I have trouble with a particular part, I will ask for help.

