diff --git a/src/extensions/tw/index.js b/src/extensions/tw/index.js
index 3fa86012..0dd0110e 100644
--- a/src/extensions/tw/index.js
+++ b/src/extensions/tw/index.js
@@ -1,5 +1,34 @@
 const formatMessage = require('format-message');
 const BlockType = require('../../extension-support/block-type');
+const ArgumentType = require('../../extension-support/argument-type');
+const Cast = require('../../util/cast');
+
+const MOUSE_BUTTONS = [
+    {
+        text: formatMessage({
+            id: 'tw.blocks.mouseButtons.left',
+            default: '(0) left',
+            description: 'left mouse button'
+        }),
+        value: 0
+    },
+    {
+        text: formatMessage({
+            id: 'tw.blocks.mouseButtons.middle',
+            default: '(1) middle',
+            description: 'middle mouse button'
+        }),
+        value: 1
+    },
+    {
+        text: formatMessage({
+            id: 'tw.blocks.mouseButtons.right',
+            default: '(2) right',
+            description: 'right mouse button'
+        }),
+        value: 2
+    }
+];
 
 /**
  * Class for TurboWarp blocks
@@ -22,24 +51,50 @@ class TurboWarpBlocks {
             id: 'tw',
             name: 'TurboWarp',
             color1: '#ff4c4c',
-            color2: '#cc3333',
+            color2: '#dd3737',
             blocks: [
                 {
                     opcode: 'getLastKeyPressed',
                     text: formatMessage({
-                        id: 'tw.lastKeyPressed',
+                        id: 'tw.blocks.lastKeyPressed',
                         default: 'last key pressed',
                         description: 'get the last key that was pressed'
                     }),
                     blockType: BlockType.REPORTER
+                },
+                {
+                    opcode: 'getButtonIsDown',
+                    text: formatMessage({
+                        id: 'tw.blocks.buttonIsDown',
+                        default: '[MOUSE_BUTTON] mouse button down?'
+                    }),
+                    blockType: BlockType.BOOLEAN,
+                    arguments: {
+                        MOUSE_BUTTON: {
+                            type: ArgumentType.NUMBER,
+                            menu: 'mouseButton',
+                            defaultValue: 0
+                        }
+                    }
                 }
-            ]
+            ],
+            menus: {
+                mouseButton: {
+                    items: MOUSE_BUTTONS,
+                    acceptReporters: true
+                }
+            }
         };
     }
 
     getLastKeyPressed (args, util) {
         return util.ioQuery('keyboard', 'getLastKeyPressed');
     }
+
+    getButtonIsDown (args, util) {
+        const button = Cast.toNumber(args.MOUSE_BUTTON);
+        return util.ioQuery('mouse', 'getButtonIsDown', [button]);
+    }
 }
 
 module.exports = TurboWarpBlocks;