Here are the steps to make a flash game:

1. Outline your game.
2. Convert the “Start Game” text into a button.
3. Press Shift+F2 to go to scenes manager.
4. Select the new scene and add the background from the library you created before (the background image movie clip).
5. Insert a frame in frame 61 by pressing F5 in the background layer.
6. Time to make the target object that you’ll use to shoot.
7. Create a new layer and name it “Actions”.
8. Open the Actions panel by pressing F9.
9. Type in the following code:
```
onClipEvent (enterFrame) {
if (Key.isDown(Key.SPACE)) {
_root.attachMovie("bullet", "bullet" + _root.getNextHighestDepth(), _root.getNextHighestDepth());
_root["bullet" + _root.getNextHighestDepth()]._x = _root.ship._x;
_root["bullet" + _root.getNextHighestDepth()]._y = _root.ship._y;
}
}
```
10. Create a new layer and name it “Bullet”.
11. Draw a small circle and convert it into a movie clip symbol named “bullet”.
12. Create another layer and name it “Ship”.
13. Draw your ship and convert it into a movie clip symbol named “ship”.
14. Add the following code to the Actions layer:
```
ship.onEnterFrame = function() {
if (Key.isDown(Key.LEFT)) {
this._x -= 10;
}
if (Key.isDown(Key.RIGHT)) {
this._x += 10;
}
if (Key.isDown(Key.UP)) {
this._y -= 10;
}
if (Key.isDown(Key.DOWN)) {
this._y += 10;
}
};
```
15. Test your game by pressing Ctrl+Enter.

I hope this helps! Let me know if you have any questions or if there's anything else I can help you with.

[Here](https://tricksmommy.com/how-to-make-a-flash-game/) is a link to an article that goes into more detail about each step if you're interested.