GMLscripts.com

Hi guys, I am new to Game Maker. I know very less. There's this game which is very nostalgic for me "Wheels" by Midway. Also Super Speed Race - Taito, same game, check out the above link.

I would love to make this game and at the same time learn the basics of GML.

People who have experience in GML: Could you tell me how hard is it to recreate the game?

I am having issues with
a) Randomly generating cars from above the "room" (I know how to destroy the instance when they scroll down off the screen..
b) Scrolling the room at different speed to simulate the speed.
c) The cars arent scrolling smoothly.
d) How to keep the score?

If this isnt the right forum then could anyone direct me to the right forum?

Thanks.