Add door sound effects

core/src/main/kotlin/com/last/commit/FirstScreen.kt

@@ -61,7 +61,7 @@ class FirstScreen(val gameState: GameState) : Screen, InputProcessor {
         shapeRenderer.setAutoShapeType(true)
 
         Gdx.input.setInputProcessor(this)
-        gameState.soundEngine.play(GameMusic.WORLD_MUSIC, 0.5f)
+        gameState.soundEngine.play(GameMusic.WORLD_MUSIC, 0.25f)
     }
 
     fun loadGameConfig(): GameConfig {

core/src/main/kotlin/com/last/commit/audio/GameSoundEffect.kt

@@ -4,6 +4,8 @@ import com.last.commit.audio.GameSound
 
 public class GameSoundEffect(name: String): GameSound(name) {
     companion object {
-        val STEPS_INDOOR = GameSoundEffect("steps_indoor.mp3");
+        val STEPS_INDOOR = GameSoundEffect("steps_indoor.mp3")
+        val DOOR_OPEN = GameSoundEffect("door_open.mp3")
+        val DOOR_CLOSE = GameSoundEffect("door_close.mp3")
     }
 }

core/src/main/kotlin/com/last/commit/audio/SoundEngine.kt

@@ -19,8 +19,8 @@ public class SoundEngine {
             println("Playing sound ${gameSound.name}")
         } else if (gameSound is GameMusic) {
             val music = loadMusic(gameSound.name)
-            music.stop()
             music.volume = volume
+            music.setLooping(true)
             music.play()
         }
     }

core/src/main/kotlin/com/last/commit/map/Door.kt

@@ -4,6 +4,7 @@ import GameState
 import com.badlogic.gdx.maps.tiled.TiledMapTileLayer.Cell
 import com.badlogic.gdx.math.Rectangle
 import com.last.commit.Wall
+import com.last.commit.audio.GameSoundEffect
 
 class Door(gridX: Int, gridY: Int, wallCollider: Rectangle, cell: Cell) :
         Wall(gridX, gridY, wallCollider, cell), Interactable {
@@ -11,11 +12,13 @@ class Door(gridX: Int, gridY: Int, wallCollider: Rectangle, cell: Cell) :
     override fun interact(otherCollider: Rectangle, state: GameState) {
         println("interacting with door $this")
         if (isClosed) {
+            state.soundEngine.play(GameSoundEffect.DOOR_OPEN)
             isOpen = true
         } else if (isOpen) {
             if (getCollider().overlaps(otherCollider)) {
                 // can't close the door cause it is colliding with given collider
             } else {
+                state.soundEngine.play(GameSoundEffect.DOOR_CLOSE)
                 isOpen = false
             }
         }