Field last_enemy_time:Float
  Field next_enemy_interval:Float

  ' create named collision groups
  Const PLAYER_GROUP:Int = 1
  Const ENEMY_GROUP:Int = 2

  Method OnCreate()
    Self.engine = New ftEngine

    default_scene = engine.GetDefaultScene()
    default_layer = engine.GetDefaultLayer()

    Local box:ftObject = Self.engine.CreateBox(120, 20, engine.GetCanvasWidth()/2, engine.GetCanvasHeight()/2)
    box.SetColor(0, 70, 70)
    box.SetMaxSpeed(20.0)
    box.SetMinSpeed(-20.0)
    ' Set the collision group the player character is part of
    ' and the collsion type
    box.SetColGroup(PLAYER_GROUP)
    box.SetColType(Self.engine.ctBox)

    Self.player = New Character(box, True)

    Self.enemies = New List<Character>()
    Self.last_enemy_time = Millisecs()
    Self.next_enemy_interval = 3000
    Seed = Millisecs()
  End

  ' .....................

  Method CreateEnemy()
  	Local rand_width:Float = Rnd(3, 7) * 10
  	Local rand_height:Float = Rnd(3, 7) * 10
  	Local rand_y:Float = Rnd(rand_height, Self.engine.GetCanvasHeight())

  	Local box:ftObject = Self.engine.CreateBox(rand_width, rand_height, Self.engine.GetCanvasWidth(), rand_y)

  	Local rand_color:Float = Rnd(0, 3)
  	Local colors:Int[] = [0, 0, 0]
  	If (rand_color <= 1.0)
  		colors = [255, 0, 0]
  	Else If (rand_color > 1.0 And rand_color <= 2.0)
  		colors = [0, 255, 0]
  	Else
  		colors = [0, 255, 0]
  	End

  	box.SetColor(colors[0], colors[1], colors[2])
  	box.SetSpeedX(Rnd(10, 30) * -1)
  	' We add the enemy box to the enemy collision group
  	' and make it able to collide with the player
  	box.SetColGroup(ENEMY_GROUP)
  	box.SetColWith(PLAYER_GROUP, True)
  	enemies.AddLast(New Character(box))

  	Self.next_enemy_interval = Rnd(0, 3) * 1000
  End