diff --git a/GGJ17/Assets/Material/SpawnParticleTrailMaterial.mat b/GGJ17/Assets/Material/SpawnParticleTrailMaterial.mat
index 7481375..1559d83 100644
Binary files a/GGJ17/Assets/Material/SpawnParticleTrailMaterial.mat and b/GGJ17/Assets/Material/SpawnParticleTrailMaterial.mat differ
diff --git a/GGJ17/Assets/Material/SpawnSplashParticleTrailMaterial.mat b/GGJ17/Assets/Material/SpawnSplashParticleTrailMaterial.mat
index 7481375..2372b5a 100644
Binary files a/GGJ17/Assets/Material/SpawnSplashParticleTrailMaterial.mat and b/GGJ17/Assets/Material/SpawnSplashParticleTrailMaterial.mat differ
diff --git a/GGJ17/Assets/Prefab/BuildingBlocks/Building_Extractor.prefab b/GGJ17/Assets/Prefab/BuildingBlocks/Building_Extractor.prefab
index ebef92b..62a53f1 100644
Binary files a/GGJ17/Assets/Prefab/BuildingBlocks/Building_Extractor.prefab and b/GGJ17/Assets/Prefab/BuildingBlocks/Building_Extractor.prefab differ
diff --git a/GGJ17/Assets/Scene/MainScene.unity b/GGJ17/Assets/Scene/MainScene.unity
index 4836d5f..a630074 100644
Binary files a/GGJ17/Assets/Scene/MainScene.unity and b/GGJ17/Assets/Scene/MainScene.unity differ
diff --git a/GGJ17/Assets/Script/IsoCamera.cs b/GGJ17/Assets/Script/IsoCamera.cs
index d02403e..442211c 100644
--- a/GGJ17/Assets/Script/IsoCamera.cs
+++ b/GGJ17/Assets/Script/IsoCamera.cs
@@ -2,24 +2,28 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-public class IsoCamera : MonoBehaviour {
-    
+public class IsoCamera : MonoBehaviour
+{
+
     public float panSpeed = 10, rotateSpeed = 100, zoomSpeed = 5;
     private const float camFocusHeight = 0;
     private Vector3 focusPoint, mousePosition;
     private new Camera camera;
+    public float zoomMin, zoomMax;
 
-	// Use this for initialization
-	void Awake () {
+    // Use this for initialization
+    void Awake()
+    {
         camera = GetComponent<Camera>();
         Vector3 globalCamForwardDir = transform.forward;
         Vector3 downProjectedCamForward = Vector3.Project(transform.TransformVector(Vector3.forward), Vector3.down);
         float m = (transform.position.y - camFocusHeight) / downProjectedCamForward.magnitude;
         focusPoint = transform.position + globalCamForwardDir * m;
     }
-	
-	// Update is called once per frame
-	void Update () {
+
+    // Update is called once per frame
+    void Update()
+    {
         #region pan
         Vector3 localMove = new Vector3(Input.GetAxis("Horizontal"), Input.GetAxis("Vertical"), 0);
         Vector3 groundMove = Vector3.ProjectOnPlane(transform.TransformVector(localMove), Vector3.up);
@@ -29,8 +33,8 @@ void Update () {
         focusPoint += translation;
         #endregion
         // poll the mouse
-        if (Input.GetMouseButton(1))
         #region rotate
+        if (Input.GetMouseButton(1))
         {
             Vector2 rotation = new Vector2(Input.GetAxis("Mouse X"), Input.GetAxis("Mouse Y"));
             rotation *= rotateSpeed * Time.deltaTime;
@@ -42,7 +46,22 @@ void Update () {
         }
         #endregion
         #region zoom
-        camera.orthographicSize += Input.mouseScrollDelta.y * zoomSpeed * Time.deltaTime;
+        // reset if out of bounds
+        if (camera.orthographicSize < zoomMin)
+        {
+            camera.orthographicSize = zoomMin;
+        }
+        else if (camera.orthographicSize > zoomMax)
+        {
+            camera.orthographicSize = zoomMax;
+        }
+        // only move if target position is within bounds
+        float targetZoom = camera.orthographicSize + Input.mouseScrollDelta.y * zoomSpeed * Time.deltaTime;
+        if ((targetZoom >= zoomMin) &&
+            (targetZoom <= zoomMax))
+        {
+            camera.orthographicSize = targetZoom;
+        }
         #endregion
     }
 
diff --git a/GGJ17/Assets/Script/WorldControl.meta b/GGJ17/Assets/Script/WorldControl.meta
deleted file mode 100644
index a651a32..0000000
--- a/GGJ17/Assets/Script/WorldControl.meta
+++ /dev/null
@@ -1,9 +0,0 @@
-fileFormatVersion: 2
-guid: 026ecd435f5e8484da51e65011b7b01b
-folderAsset: yes
-timeCreated: 1485043945
-licenseType: Free
-DefaultImporter:
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: