diff --git a/Makefile b/Makefile
index 58872d8..ab100a4 100644
--- a/Makefile
+++ b/Makefile
@@ -346,7 +346,7 @@ $(RES)/ueforth_res64.res: windows/ueforth.rc $(RES)/eforth.ico
 # ---- WEB ----
 
 web: web_target web_tests
-web_target: $(WEB)/terminal.html $(WEB)/ueforth.js
+web_target: $(WEB)/terminal.html $(WEB)/lazy_terminal.html $(WEB)/ueforth.js
 
 $(WEB):
 	mkdir -p $(WEB)
@@ -354,6 +354,9 @@ $(WEB):
 $(WEB)/terminal.html: web/terminal.html | $(WEB)
 	cp $< $@
 
+$(WEB)/lazy_terminal.html: web/lazy_terminal.html | $(WEB)
+	cp $< $@
+
 $(WEB)/ueforth.js: \
         web/fuse_web.js \
         web/web.template.js \
diff --git a/web/lazy_terminal.html b/web/lazy_terminal.html
new file mode 100644
index 0000000..61929cd
--- /dev/null
+++ b/web/lazy_terminal.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!--
+Copyright 2022 Bradley D. Nelson
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+-->
+
+<script>
+  var ueforth = null;
+  window.onload = function() {
+    window.onclick = function() {
+      window.onclick = null;
+      ueforth.Start();
+    };
+  };  
+</script>
+<script src="ueforth.js"></script>
diff --git a/web/web.template.js b/web/web.template.js
index d049685..c526ca0 100644
--- a/web/web.template.js
+++ b/web/web.template.js
@@ -16,7 +16,7 @@
 
 (function() {
 
-const HEAP_SIZE = (1024 * 1024);
+const HEAP_SIZE = (4 * 1024 * 1024);
 const STACK_CELLS = 4096;
 const VOCABULARY_DEPTH = 16;
 
@@ -601,18 +601,29 @@ function getGlobalObj() {
 var globalObj = getGlobalObj();
 
 var module = VM(globalObj, ffi, heap);
+
 function run() {
   module.run();
   setTimeout(run, 0);
 }
-if (globalObj.write) {
+
+function Start() {
   Init();
   setTimeout(run, 0);
+}
+
+if (globalObj.write) {
+  Start();
 } else {
-  window.addEventListener('load', function() {
-    Init();
-    setTimeout(run, 0);
-  });
+  if (globalObj.ueforth === null) {
+    globalObj.ueforth = context;
+    context.Start = Start;
+  } else {
+    window.addEventListener('load', function() {
+      Init();
+      setTimeout(run, 0);
+    });
+  }
 }
 
 })();
