diff --git a/fullscreen.js b/fullscreen.js
new file mode 100644
index 0000000..9c0130e
--- /dev/null
+++ b/fullscreen.js
@@ -0,0 +1,91 @@
+// fullscreen.js
+//  Add fullscreen controls to the engine.
+// Makes easier to go into and go out of fullscreen
+// in mobile.
+var fullscreen = {
+    waitTC: false,
+    isFullscreen: false,
+    originalBG: null,
+    exitFullscreen: function() {
+        if (document.exitFullscreen) {
+            document.exitFullscreen();
+        } else if (document.mozCancelFullScreen) {
+            document.mozCancelFullScreen();
+        } else if (document.webkitExitFullscreen) {
+            document.webkitExitFullscreen();
+        }
+        this.isFullscreen = false;
+    },
+    launchIntoFullscreen: function(element) {
+        if (element.requestFullscreen) {
+            element.requestFullscreen();
+        } else if (element.mozRequestFullScreen) {
+            element.mozRequestFullScreen();
+        } else if (element.webkitRequestFullscreen) {
+            element.webkitRequestFullscreen();
+        } else if (element.msRequestFullscreen) {
+            element.msRequestFullscreen();
+        }
+        this.isFullscreen = true;
+    },
+    setup: function() {
+        var createButton = function(buttonname, context, func) {
+            var button = document.createElement("input");
+            button.type = "button";
+            button.value = buttonname;
+            button.id = 'fullscreen_button'
+
+            //make flat
+            button.style['appearance'] = 'none';
+            button.style['box-shadow'] = 'none';
+            button.style['border-radius'] = 0;
+            button.style['color'] = '#bbb';
+            button.style['background-color'] = '#111';
+            button.style['border'] = 'none';
+            button.style['font-size'] = '32px'
+            button.style['font-family'] = 'INFO56';
+            button.style['outline'] = 'none';
+
+            //place at bottom left
+            button.style.position = 'fixed';
+            button.style['z-index'] = 1000;
+            button.style.bottom = '0px';
+            button.style.right = '0px';
+
+            button.addEventListener('click', func)
+            button.addEventListener('touchstart', func)
+
+            context.appendChild(button);
+
+        };
+
+        createButton('[  ]', document.documentElement, function() {
+            if(fullscreen.waitTC){
+              return
+            } else {
+              fullscreen.waitTC = true
+              setTimeout(function(){fullscreen.waitTC=false;},100)
+            }
+
+            if (fullscreen.isFullscreen) {
+                fullscreen.exitFullscreen();
+                if(fullscreen.originalBG==null || typeof fullscreen.originalBG=== 'undefined'){
+                    document.documentElement.style.backgroundColor = '#000000';
+                } else {
+                    document.documentElement.style.backgroundColor = fullscreen.originalBG;
+                }
+                document.getElementById('fullscreen_button').value = '[  ]'
+                document.getElementById('fullscreen_button').style['color'] = '#bbb';
+                document.getElementById('fullscreen_button').style['opacity'] = 1;
+            } else {
+                fullscreen.launchIntoFullscreen(document.documentElement);
+                fullscreen.originalBG = document.documentElement.style.backgroundColor;
+                document.documentElement.style.backgroundColor = '#000000';
+                document.getElementById('fullscreen_button').value = '>[]<'
+                document.getElementById('fullscreen_button').style['color'] = '#666';
+                document.getElementById('fullscreen_button').style['opacity'] = 0.5;
+            }
+        })
+    }
+}
+fullscreen.setup();