Game making

I am trying to learn actionscript, and I want to build games. Sofar I have built a player who can move in the screen with keyboard, next will be for items to drop from the sky which this player should collect.These items shall fall in random order, a certain ammount should be catched before the time runs out, if it touches the ground it will disappear, if it lands on your head you lose life, and finally there should be some items that count more points. All of this I want to make into another level, where it gets progressivly harder to catch all items in time. I know this might sound like a lot too do, but I want to learn and I’m not sure where to start .:block: