ActionScript 3.0 Type Was Not Found Or Was Not A Compile-Time Constant - actionscript-3

Question

I just started programming a game and I when I ran my code it said
1064:Type Was Not Found Or Was Not A Compile-Time Constant:Event
1064:Type Was Not Found Or Was Not A Compile-Time Constant:Mouse Event
Here is the code:
package{
public class Script_1 {
public static const STATE_INIT:int = 10
public static const STATE_PLAY:int = 20
public static const STATE_GAME_OVER:int = 30
public var gameState:int = 0
public function gameLoop(e:Event):void{
switch(gameState) {
case STATE_INIT:
initGame();
break;
case STATE_PLAY:
playGame();
break;
case STATE_GAME_OVER:
gameOver();
break;
}
}
public function Game(){
addEventListener(Event.ENTER_FRAME, gameLoop);
gameState = STATE_INIT;
}
stage.addEventListener(MouseEvent.CLICK, onMouseClickEvent);
public function initGame():void{
stage.addEventListener(MouseEvent.CLICK, onMouseClickEvent);
clicks = 0
gameState = STATE_PLAY;
}
public function playGame(){
if (clicks >= 10){
gameState = STATE_GAME_OVER;
}
}
public function onMouseClickEvent(e:MouseEvent):void{
clicks++;
trace("mouse click number:" + clicks);
}
public function gameOver():void{
stage.removeEventListener(MouseEvent.CLICK, onMouseClickEvent);
gameState = STATE_INIT;
trace("game over");
}
}
}
This is in a file called Script_1.as

Answer 1

You need to import those classes with the import statement. This statement is required for each class that is missing and belongs above the class definition:
package
{
// Imports.
import flash.events.Event;
import flash.events.MouseEvent;
public class Script_1
{
// ..
}
}
Also, some misc things I noticed:
You're using addEventListener() but Script_1 does not extend EventDispatcher or at least implement IEventDispatcher. Based on the events you're trying to listen for, Sprite seems most suitable.
It looks like your class should either be Game or your constructor function Game() should be Script_1().