diff --git a/assets/sound/vo/aperture_ai/04_part1_entry-1.sox b/assets/sound/vo/aperture_ai/04_part1_entry-1.sox
new file mode 100644
index 0000000..5ad82e6
--- /dev/null
+++ b/assets/sound/vo/aperture_ai/04_part1_entry-1.sox
@@ -0,0 +1 @@
+-c 1 -r 22050
diff --git a/assets/sound/vo/aperture_ai/04_part1_success-1.sox b/assets/sound/vo/aperture_ai/04_part1_success-1.sox
new file mode 100644
index 0000000..5ad82e6
--- /dev/null
+++ b/assets/sound/vo/aperture_ai/04_part1_success-1.sox
@@ -0,0 +1 @@
+-c 1 -r 22050
diff --git a/assets/test_chambers/test_chamber_04/test_chamber_04.blend b/assets/test_chambers/test_chamber_04/test_chamber_04.blend
index 30f145b..faf1a4d 100644
Binary files a/assets/test_chambers/test_chamber_04/test_chamber_04.blend and b/assets/test_chambers/test_chamber_04/test_chamber_04.blend differ
diff --git a/src/levels/level_definition.h b/src/levels/level_definition.h
index 3db9e0b..1c5af1a 100644
--- a/src/levels/level_definition.h
+++ b/src/levels/level_definition.h
@@ -212,6 +212,7 @@ struct BallLauncherDefinition {
     struct Quaternion rotation;
     short roomIndex;
     short signalIndex;
+    float ballLifetime;
 };
 
 struct BallCatcherDefinition {
diff --git a/src/scene/ball.c b/src/scene/ball.c
index 5956cc2..b41a5bd 100644
--- a/src/scene/ball.c
+++ b/src/scene/ball.c
@@ -45,7 +45,7 @@ void ballInitInactive(struct Ball* ball) {
     ball->flags = 0;
 }
 
-void ballInit(struct Ball* ball, struct Vector3* position, struct Vector3* velocity, short startingRoom) {
+void ballInit(struct Ball* ball, struct Vector3* position, struct Vector3* velocity, short startingRoom, float ballLifetime) {
     collisionObjectInit(&ball->collisionObject, &gBallCollider, &ball->rigidBody, 1.0f, 0);
 
     collisionSceneAddDynamicObject(&ball->collisionObject);
@@ -58,7 +58,6 @@ void ballInit(struct Ball* ball, struct Vector3* position, struct Vector3* veloc
     ball->rigidBody.transform.scale = gOneVec;
     ball->rigidBody.currentRoom = startingRoom;
     ball->flags = 0;
-    ball->lifetime = BALL_LIFETIME;
 
     ball->targetSpeed = sqrtf(vector3MagSqrd(&ball->rigidBody.velocity));
 
diff --git a/src/scene/ball.h b/src/scene/ball.h
index d744d34..4169c24 100644
--- a/src/scene/ball.h
+++ b/src/scene/ball.h
@@ -4,7 +4,6 @@
 #include "../physics/collision_object.h"
 
 #define BALL_VELOCITY   2.0f
-#define BALL_LIFETIME   10.0f
 #define BALL_FADE_TIME  3.0f
 
 enum BallFlags {
@@ -22,7 +21,7 @@ struct Ball {
 };
 
 void ballInitInactive(struct Ball* ball);
-void ballInit(struct Ball* ball, struct Vector3* position, struct Vector3* velocity, short startingRoom);
+void ballInit(struct Ball* ball, struct Vector3* position, struct Vector3* velocity, short startingRoom, float ballLifetime);
 void ballTurnOnCollision(struct Ball* ball);
 
 void ballUpdate(struct Ball* ball);
diff --git a/src/scene/ball_launcher.c b/src/scene/ball_launcher.c
index 18727d0..cd548da 100644
--- a/src/scene/ball_launcher.c
+++ b/src/scene/ball_launcher.c
@@ -62,6 +62,7 @@ void ballLauncherInit(struct BallLauncher* launcher, struct BallLauncherDefiniti
     launcher->rigidBody.currentRoom = definition->roomIndex;
 
     launcher->signalIndex = definition->signalIndex;
+    launcher->ballLifetime = definition->ballLifetime;
 
     collisionObjectUpdateBB(&launcher->collisionObject);
 
@@ -89,7 +90,7 @@ void ballLauncherUpdate(struct BallLauncher* launcher) {
         quatMultVector(&launcher->rigidBody.transform.rotation, &gForward, &initialVelocity);
         vector3Scale(&initialVelocity, &initialVelocity, BALL_VELOCITY);
 
-        ballInit(&launcher->currentBall, &launcher->rigidBody.transform.position, &initialVelocity, launcher->rigidBody.currentRoom);
+        ballInit(&launcher->currentBall, &launcher->rigidBody.transform.position, &initialVelocity, launcher->rigidBody.currentRoom, launcher->ballLifetime);
         skAnimatorRunClip(&launcher->animator, &props_combine_ball_launcher_Armature_launch_clip, 0.0f, 0);
     }
 
diff --git a/src/scene/ball_launcher.h b/src/scene/ball_launcher.h
index 5c3bf53..8c9e925 100644
--- a/src/scene/ball_launcher.h
+++ b/src/scene/ball_launcher.h
@@ -16,6 +16,7 @@ struct BallLauncher {
     struct SKAnimator animator;
     short dynamicId;
     short signalIndex;
+    float ballLifetime;
     struct Ball currentBall;
 };
 
diff --git a/tools/level_scripts/collision_export.lua b/tools/level_scripts/collision_export.lua
index 8142cac..95e9057 100644
--- a/tools/level_scripts/collision_export.lua
+++ b/tools/level_scripts/collision_export.lua
@@ -269,6 +269,24 @@ local room_grids = {}
 
 for index, node in pairs(collider_nodes) do
     local is_transparent = sk_scene.find_flag_argument(node.arguments, "transparent")
+
+    local collision_layers = {}
+
+    for _, arg in pairs(node.arguments) do
+        if string.sub(arg, 1, #"CL_") == "CL_" then
+            table.insert(collision_layers, 'COLLISION_LAYERS_' .. string.sub(arg, #"CL_" + 1))
+        end
+    end
+
+    if #collision_layers == 0 then
+        table.insert(collision_layers, 'COLLISION_LAYERS_STATIC')
+        table.insert(collision_layers, 'COLLISION_LAYERS_BLOCK_BALL')
+        table.insert(collision_layers, 'COLLISION_LAYERS_TANGIBLE')
+
+        if is_transparent then 
+            table.insert(collision_layers, 'COLLISION_LAYERS_TRANSPARENT')
+        end
+    end
         
     for _, mesh in pairs(node.node.meshes) do
         local global_mesh = mesh:transform(node.node.full_transformation)
@@ -306,9 +324,7 @@ for index, node in pairs(collider_nodes) do
             sk_definition_writer.reference_to(collider_type),
             sk_definition_writer.null_value,
             bb,
-            is_transparent and 
-                sk_definition_writer.raw('COLLISION_LAYERS_STATIC | COLLISION_LAYERS_BLOCK_BALL | COLLISION_LAYERS_TRANSPARENT | COLLISION_LAYERS_TANGIBLE') or
-                sk_definition_writer.raw('COLLISION_LAYERS_STATIC | COLLISION_LAYERS_BLOCK_BALL | COLLISION_LAYERS_TANGIBLE')
+            sk_definition_writer.raw(table.concat(collision_layers, ' | '))
         })
     end
 end
diff --git a/tools/level_scripts/entities.lua b/tools/level_scripts/entities.lua
index 202083b..0c345a3 100644
--- a/tools/level_scripts/entities.lua
+++ b/tools/level_scripts/entities.lua
@@ -186,6 +186,7 @@ for _, switch_element in pairs(sk_scene.nodes_for_type('@ball_launcher')) do
         rotation * sk_math.axis_angle(sk_math.vector3(1, 0, 0), math.pi * 0.5),
         room_index,
         signals.signal_index_for_name(switch_element.arguments[1]),
+        switch_element.arguments[2] and tonumber(switch_element.arguments[2]) or 10
     })
 end