diff --git a/src/index.js b/src/index.js
index 01f63d8..9333102 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,4 +1,5 @@
 const { Game } = require('./js/game')
+window.b2 = require('./vendor/jsbox2d')
 const config = require('./js/config')
 
 var game