[AS3 Code] Play a balloon game

Package
{
Import flash. display. MovieClip;
Import flash. display. Sprite;
Import flash. events. Event;
Import flash. events. MouseEvent;
Import flash. geom. Rectangle;
Import flash. media. Sound;
Import flash. text .*;

Public class Main extends Sprite
{
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; // game status

Public var score: int = 0; // score of the player
Public var chances: int = 0; // number of missing balloons
Public var level: Number = 1; // level

Public var bg: MovieClip;
Public var enemies: Array; // Array for storing enemies (balloons)
Public var player: MovieClip; // reference the player's picture
Public var tempEnemy: MovieClip; // random balloon

Public var scoreLabel: TextField = new TextField (); // score title
Public var levelLabel: TextField = new TextField (); // level title
Public var chancesLabel: TextField = new TextField (); // the title of the missed net.
Public var scoreText: TextField = new TextField (); // minute Value
Public var levelText: TextField = new TextField (); // level value
Public var chancesText: TextField = new TextField (); // network leakage value
Public const SCOREBOARD_Y: Number = 380; // The Score Board is located at the bottom of the game.

Public function Main (): void
{
Init ();
}
Private function init (): void
{
This. addEventListener (Event. ENTER_FRAME, gameLoop );

// Display the background
Bg = new BackImage ();
This. addChild (bg );

// Set the title and default value of the score board
ScoreLabel. text = "score :";
ScoreText. text = "0 ";
LevelLabel. text = "grade :";
LevelText. text = "1 ";
ChancesLabel. text = "collision :";
ChancesText. text = "0 ";

// Place the game at the bottom
ScoreLabel. y = SCOREBOARD_Y;
LevelLabel. y = SCOREBOARD_Y;
ChancesLabel. y = SCOREBOARD_Y;
ScoreText. y = SCOREBOARD_Y;
LevelText. y = SCOREBOARD_Y;

ChancesText. y = SCOREBOARD_Y;

// Set the title and value horizontal coordinates
ScoreLabel. x = 5;
ScoreText. x = 50;
ChancesLabel. x = 105;
ChancesText. x = 155;
LevelLabel. x = 205;
LevelText. x = 260;

// Display the score board
This. addChild (scoreLabel );
This. addChild (levelLabel );
This. addChild (chancesLabel );
This. addChild (scoreText );
This. addChild (levelText );
This. addChild (chancesText );

GameState = STATE_INIT;
}

// Loop function for game status adjustment
Public function gameLoop (e: Event): void
{
Switch (gameState)
{
Case STATE_INIT:
InitGame ();
Break;

Case STATE_PLAY:
PlayGame ();
Break;

Case STATE_GAME_OVER:
EndGame ();
Break;
}
}

// Initialize the game
Public function initGame (): void
{
// Initialize the game
Score = 0; // score
Chances = 0; // Number of missed Networks
// Level = 1;

LevelText. text = level. toString ();

Player = new PlayerImage ();
This. addChild (player );
Player. startDrag (true, new Rectangle (0, 0, 550,400 ));

// Store balloons
Enemies = new Array ();

GameState = STATE_PLAY;
}

// Start the game
Public function playGame (): void
{
// Rotate the dart
Player. rotation + = 20;

// Create a balloon (enemy) Function
MakeEnemies ();

// Update and pray for Y coordinates and remove them when the screen is floated out
MoveEnemies ();

// Checks whether the player has collided with the enemy. If yes, an event is triggered.
TestCollisions ();

// Check whether the level can be increased or the game can end
TestForEnd ();
}

Public function makeEnemies (): void
{
// Obtain a random number between 0 and 99
Var chance: Number = Math. floor (Math. random () * 100 );

// The higher the level, the higher the probability of balloon appearance
If (chance <level + 2)
{
// Create a balloon
TempEnemy = new EnemyImage ();

// The higher the level, the faster the balloon is.
TempEnemy. speed = level + 3;

// Randomly fl the balloon of the corresponding color from 1 to 5 frames
Var xxxx = Math. floor (Math. random () * 5) + 1;
TempEnemy. gotoAndStop (xxxx );

// Coordinates of the Y axis of the balloon, starting from the bottom
TempEnemy. y = 435;

// Coordinates of the X axis of the balloon. The screen is 0-540, so the balloon (which has 30 widths) is randomly flushed from 0.
TempEnemy. x = Math. floor (Math. random () * 515 );

Var tt: TextField = new TextField ();
Var ttf: TextFormat = new TextFormat ();
Ttf. bold = true;
Ttf. align = "center ";
Ttf. size = 30;
Tt. text = xxxx;
Tt. setTextFormat (ttf );
TempEnemy. addChild (tt );

// Display the balloon to the scenario
This. addChild (tempEnemy );

// Add it to the balloon array for tracking
Enemies. push (tempEnemy );
}
}

// Facilitate the balloon array, update the Y coordinates of each balloon, and move the balloon up
Public function moveEnemies (): void
{
Var tempEnemy: MovieClip;
For (var I: int = enemies. length-1; I> = 0; I --)
{
TempEnemy = enemies [I];
TempEnemy. y-= tempEnemy. speed;

// If the balloon goes down to the top of the screen
If (tempEnemy. y <-35)
{
Chances ++; // Number of missed connections + 1
ChancesText. text = chances. toString ();
Enemies. splice (I, 1); // Delete the balloon from the balloon Array
RemoveChild (tempEnemy); // remove the balloon from the display list
}
}
}

// Darts and balloon Collision Detection
Public function testCollisions (): void
{
// Call the sound object
Var sound: Sound = new Pop ();
Var tempEnemy: MovieClip;

// Traverse the remaining balloons from the balloon Array
For (var I: int = enemies. length-1; I> = 0; I --)
{
TempEnemy = enemies [I];

// Check whether the current balloon is in conflict with the dart
If (tempEnemy. hitTestObject (player ))
{
Score ++;
ScoreText. text = score. toString ();
Sound. play ();
Enemies. splice (I, 1); // Delete the balloon from the balloon Array
RemoveChild (tempEnemy); // remove the balloon from the display list
}
}
}

// Check whether the level can be increased or the game can end
Public function testForEnd (): void
{
If (chances> = 5)
{
GameState = STATE_GAME_OVER;
}
Else if (score> = level * 5)
{
Level ++;
LevelText. text = level. toString ();

Var level_up: TextField = new TextField ();
Level_up.text = "Congratulations! Upgraded to "+ level + !!! ";
This. addChild (level_up );
}
}

// End the game
Public function endGame (): void
{
// Remove balloons from the display list one by one
For (var I: int = 0; I <enemies. length; I ++)
{
RemoveChild (enemies [I]);
Enemies = [];
}

Player. stopDrag ();
}
}
}