correções dos erros

src/exemplo/CatchTheStars.scala

@@ -10,13 +10,13 @@ import com.sun.org.apache.bcel.internal.generic.Select
 object CatchTheStars extends App {
 
   case class Player(var x: Double, var y: Double) {
-    val img = Image("Spacecraft.png")
+    val image = Image("Spacecraft.png")
     var score = 0
     var vel_x, vel_y = 0.0
     var angle = 0.0
 
     def draw() = {
-      img.centralized_draw(x, y, 3, angle)
+      image.centralized_draw(x, y, 3, angle)
     }
 
     def rotate_right() = {
@@ -63,15 +63,15 @@ object CatchTheStars extends App {
 
     def draw() = {
       val image = images((Clock.milisegundos / 100 + i) % images.size)
-      image.centralized_draw(x, y, 1) //PROBLEMA N IDENTIFICADO 
+      image.centralized_draw(x, y, 1) 
 
     }
   }
 
   val background = Image("Space.png")
   val spacecraft = Player(game.width / 2, game.height / 2)
   var time = 0.0
-  var stars = List(0, Star())
+  var stars = List[Star]()
   var state = "START"
   val font = Fonts(16)
 
@@ -85,6 +85,7 @@ object CatchTheStars extends App {
 
   def draw() = {
     background.draw(0, 0, 0)
+    println("Desenhando")
     state match {
       case "START"  => update_start
       case "PLAYING" => update_playing
@@ -114,7 +115,7 @@ object CatchTheStars extends App {
       stars = Star() :: stars
     }
 
-    stars = spacecraft.catch_the_stars(stars) // Catch the stars //PROBLEMA N IDENTIFICADO 
+    stars = spacecraft.catch_the_stars(stars) // Catch the stars 
     spacecraft.move // update player position
     time = time + 1.0 / 60.0 // increase time
     if (time.intValue() >= 30) {
@@ -125,7 +126,7 @@ object CatchTheStars extends App {
   def draw_player() = {
     spacecraft.draw
     for (star <- stars) {
-      star.draw //PROBLEMA N IDENTIFICADO 
+      star.draw 
 
     }
     font.draw(s"Placar: ${spacecraft.score}", 10, 20, 3, ColorF.YELLOW)

src/jerimum/Drawing.scala

@@ -5,7 +5,7 @@ import java.awt.{ Graphics2D, RenderingHints }
 import scala.collection.SortedMap
 
 
-object Draw {
+object Drawing {
   private[this] val empty = SortedMap[Int, List[Graphics2D => Unit]]()
   private[this] var layers = empty
   private[this] def all = layers.values.flatten

src/jerimum/Fonts.scala

@@ -11,7 +11,7 @@ case class Fonts(size: Int) {
   private[this] val font = new Font("Dialog", Font.BOLD, size);
 
   def draw_centered(msg: String, x: Double, y: Double, z: Int, c: ColorF) = {
-    Draw.include(z, g => {
+    Drawing.include(z, g => {
       g.setColor(c.color)
       g.setFont(font)
       val width = g.getFontMetrics.stringWidth(msg)
@@ -22,7 +22,7 @@ case class Fonts(size: Int) {
   }
 
   def draw(msg: String, x: Double, y: Double, z: Int, c: ColorF) = {
-    Draw.include(z, g => {
+    Drawing.include(z, g => {
       g.setColor(c.color)
       g.setFont(font)
       g.drawString(msg, x.toInt, y.toInt)

src/jerimum/Game.scala

@@ -14,7 +14,7 @@ object Game extends Runnable {
   private[this] var running = false
   private[this] var thread: Thread = _
 
-  private[this] var draw, update = () => {}
+  private[this] var dwg, update = () => {}
 
   private[this] def init() = {
     display = new Screen(title, width, height) {
@@ -33,7 +33,7 @@ object Game extends Runnable {
       case Some(strategy) => strategy.getDrawGraphics match {
         case g: Graphics2D =>
           g.clearRect(0, 0, width, height)
-          Draw.draw(g)
+          Drawing.draw(g)
           strategy.show
           g.dispose()
       }
@@ -54,7 +54,7 @@ object Game extends Runnable {
       last = now
       if (delta >= 1) {
         update()
-        drawing()
+        dwg()
         drawing()
         cycles += 1
         delta -= 1
@@ -75,7 +75,7 @@ object Game extends Runnable {
     this.height = height
     this.fps = fps
     this.update = update _
-    this.draw = draw _
+    this.dwg = draw _
     if (!running) {
       running = true
       thread = new Thread(this) {

src/jerimum/Image.scala

@@ -41,7 +41,7 @@ object Image {
       lists(id) = list.toList
       lists(id)
     })
-    List(l)
+    l
   }
 }
 
@@ -62,7 +62,7 @@ class Image(val buffer: BufferedImage, val road: String = "") {
       Image.lists(id) = list.toList
       Image.lists(id)
     })
-    List(l)
+    l
   }
 
   private[this] def spin(g: Graphics2D, angle: Double, x: Double, y: Double, scalaX: Double, scalaY: Double)(draw: => Unit): Unit = {
@@ -73,7 +73,7 @@ class Image(val buffer: BufferedImage, val road: String = "") {
   }
 
   def draw(x: Double, y: Double, z: Int, angle: Double = 0.0, scalaX: Double = 1.0, scalaY: Double = 1.0): Unit = {
-    Draw.include(z, g => {
+    Drawing.include(z, g => {
       spin(g, angle, x, y, scalaX, scalaY) {
         val width = (buffer.getWidth * scalaX).toInt
         val height = (buffer.getHeight * scalaY).toInt