diff --git a/Makefile b/Makefile
index 569fb0b..a076ddf 100644
--- a/Makefile
+++ b/Makefile
@@ -58,7 +58,8 @@ ifeq ($(PLATFORM), emscripten)
     LDFLAGS += -s USE_SDL=2\
 			   -s ASYNCIFY \
 			   -s ALLOW_MEMORY_GROWTH=1 \
-               --preload-file test/paint.rom@paint.rom
+               --preload-file test/paint.rom@paint.rom \
+			   --shell-file $(ARCH_DIR)/shell_minimal.html
 
     # For release: optimize, strip debug, minimize size
     ifeq ($(BUILD_MODE), release)
diff --git a/src/arch/emscripten/main.c b/src/arch/emscripten/main.c
index 4b93d85..eb80c82 100644
--- a/src/arch/emscripten/main.c
+++ b/src/arch/emscripten/main.c
@@ -31,94 +31,6 @@ static DeviceOps console_device_ops = {
 static ScreenDeviceData screen_data = {0};
 static MouseDeviceData mouse_data = {0};
 
-const char *opcode_to_string(Opcode op) {
-  static const char *names[] = {[OP_HALT] = "halt",
-                                [OP_JMP] = "jump",
-                                [OP_JMPF] = "jump-if-flag",
-                                [OP_CALL] = "call",
-                                [OP_RETURN] = "return",
-                                [OP_LOAD_IMM] = "load-immediate",
-                                [OP_GET_8] = "get-8",
-                                [OP_GET_16] = "get-16",
-                                [OP_GET_32] = "get",
-                                [OP_LOAD_8] = "load-8",
-                                [OP_LOAD_16] = "load-16",
-                                [OP_LOAD_32] = "load",
-                                [OP_STORE_8] = "store-8",
-                                [OP_STORE_16] = "store-16",
-                                [OP_STORE_32] = "store",
-                                [OP_PUT_8] = "put-8",
-                                [OP_PUT_16] = "put-16",
-                                [OP_PUT_32] = "put",
-                                [OP_MALLOC] = "malloc",
-                                [OP_MEMSET_8] = "memset-8",
-                                [OP_MEMSET_16] = "memset-16",
-                                [OP_MEMSET_32] = "memset-32",
-                                [OP_PUSH] = "push",
-                                [OP_POP] = "pop",
-                                [OP_REG_MOV] = "register-move",
-                                [OP_SYSCALL] = "syscall",
-                                [OP_SLL] = "bit-shift-left",
-                                [OP_SRL] = "bit-shift-right",
-                                [OP_SRE] = "bit-shift-re",
-                                [OP_BAND] = "bit-and",
-                                [OP_BOR] = "bit-or",
-                                [OP_BXOR] = "bit-xor",
-                                [OP_ADD_INT] = "add-int",
-                                [OP_SUB_INT] = "sub-int",
-                                [OP_MUL_INT] = "mul-int",
-                                [OP_DIV_INT] = "div-int",
-                                [OP_ADD_UINT] = "add-nat",
-                                [OP_SUB_UINT] = "sub-nat",
-                                [OP_MUL_UINT] = "mul-nat",
-                                [OP_DIV_UINT] = "div-nat",
-                                [OP_ADD_REAL] = "add-real",
-                                [OP_SUB_REAL] = "sub-real",
-                                [OP_MUL_REAL] = "mul-real",
-                                [OP_DIV_REAL] = "div-real",
-                                [OP_INT_TO_REAL] = "int-to-real",
-                                [OP_UINT_TO_REAL] = "nat-to-real",
-                                [OP_REAL_TO_INT] = "real-to-int",
-                                [OP_REAL_TO_UINT] = "real-to-nat",
-                                [OP_JEQ_INT] = "jump-eq-int",
-                                [OP_JNEQ_INT] = "jump-neq-int",
-                                [OP_JGT_INT] = "jump-gt-int",
-                                [OP_JLT_INT] = "jump-lt-int",
-                                [OP_JLE_INT] = "jump-le-int",
-                                [OP_JGE_INT] = "jump-ge-int",
-                                [OP_JEQ_UINT] = "jump-eq-nat",
-                                [OP_JNEQ_UINT] = "jump-neq-nat",
-                                [OP_JGT_UINT] = "jump-gt-nat",
-                                [OP_JLT_UINT] = "jump-lt-nat",
-                                [OP_JLE_UINT] = "jump-le-nat",
-                                [OP_JGE_UINT] = "jump-ge-nat",
-                                [OP_JEQ_REAL] = "jump-eq-real",
-                                [OP_JNEQ_REAL] = "jump-neq-real",
-                                [OP_JGE_REAL] = "jump-ge-real",
-                                [OP_JGT_REAL] = "jump-gt-real",
-                                [OP_JLT_REAL] = "jump-lt-real",
-                                [OP_JLE_REAL] = "jump-le-real",
-                                [OP_STRLEN] = "string-length",
-                                [OP_STREQ] = "string-eq",
-                                [OP_STRCAT] = "string-concat",
-                                [OP_STR_GET_CHAR] = "string-get-char",
-                                [OP_STR_FIND_CHAR] = "string-find-char",
-                                [OP_STR_SLICE] = "string-slice",
-                                [OP_INT_TO_STRING] = "int-to-string",
-                                [OP_UINT_TO_STRING] = "nat-to-string",
-                                [OP_REAL_TO_STRING] = "real-to-string",
-                                [OP_STRING_TO_INT] = "string-to-int",
-                                [OP_STRING_TO_UINT] = "string-to-nat",
-                                [OP_STRING_TO_REAL] = "string-to-real"};
-
-  if (op < 0 || op >= (int)(sizeof(names) / sizeof(names[0]))) {
-    return "<invalid-opcode>";
-  }
-
-  const char *name = names[op];
-  return name ? name : "<unknown-opcode>";
-}
-
 void mainloop() {
   SDL_Event event;
   SDL_PumpEvents();
@@ -181,7 +93,6 @@ void mainloop() {
   int cycles_this_frame = 0;
   int max_cycles_per_frame = 1000; // Adjust this value
   while (cycles_this_frame < max_cycles_per_frame) {
-      // printf("%s\n", opcode_to_string(vm.code[vm.pc])); // REMOVE THIS LINE
       if (!step_vm(&vm)) {
           emscripten_cancel_main_loop();
           return;
diff --git a/src/arch/emscripten/shell_minimal.html b/src/arch/emscripten/shell_minimal.html
new file mode 100644
index 0000000..988746e
--- /dev/null
+++ b/src/arch/emscripten/shell_minimal.html
@@ -0,0 +1,141 @@
+<!doctype html>
+<html lang="en-us">
+  <head>
+    <meta charset="utf-8">
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+    <title>Emscripten-Generated Code</title>
+    <style>
+      .emscripten { padding-right: 0; margin-left: auto; margin-right: auto; display: block; }
+      textarea.emscripten { font-family: monospace; width: 80%; }
+      div.emscripten { text-align: center; }
+      div.emscripten_border { border: 1px solid black; }
+      /* the canvas *must not* have any border or padding, or mouse coords will be wrong */
+      canvas.emscripten { border: 0px none; background-color: black; }
+
+      .spinner {
+        height: 50px;
+        width: 50px;
+        margin: 0px auto;
+        -webkit-animation: rotation .8s linear infinite;
+        -moz-animation: rotation .8s linear infinite;
+        -o-animation: rotation .8s linear infinite;
+        animation: rotation 0.8s linear infinite;
+        border-left: 10px solid rgb(0,150,240);
+        border-right: 10px solid rgb(0,150,240);
+        border-bottom: 10px solid rgb(0,150,240);
+        border-top: 10px solid rgb(100,0,200);
+        border-radius: 100%;
+        background-color: rgb(200,100,250);
+      }
+      @-webkit-keyframes rotation {
+        from {-webkit-transform: rotate(0deg);}
+        to {-webkit-transform: rotate(360deg);}
+      }
+      @-moz-keyframes rotation {
+        from {-moz-transform: rotate(0deg);}
+        to {-moz-transform: rotate(360deg);}
+      }
+      @-o-keyframes rotation {
+        from {-o-transform: rotate(0deg);}
+        to {-o-transform: rotate(360deg);}
+      }
+      @keyframes rotation {
+        from {transform: rotate(0deg);}
+        to {transform: rotate(360deg);}
+      }
+
+    </style>
+  </head>
+  <body>
+    <hr/>
+    <figure style="overflow:visible;" id="spinner"><div class="spinner"></div><center style="margin-top:0.5em"><strong>emscripten</strong></center></figure>
+    <div class="emscripten" id="status">Downloading...</div>
+    <div class="emscripten">
+      <progress value="0" max="100" id="progress" hidden=1></progress>  
+    </div>
+    <div class="emscripten_border">
+      <canvas class="emscripten" id="canvas" oncontextmenu="event.preventDefault()" tabindex=-1></canvas>
+    </div>
+    <hr/>
+    <div class="emscripten">
+      <input type="checkbox" id="resize">Resize canvas
+      <input type="checkbox" id="pointerLock" checked>Lock/hide mouse pointer
+      &nbsp;&nbsp;&nbsp;
+      <input type="button" value="Fullscreen" onclick="Module.requestFullscreen(document.getElementById('pointerLock').checked, 
+                                                                                document.getElementById('resize').checked)">
+    </div>
+    
+    <hr/>
+    <textarea class="emscripten" id="output" rows="8"></textarea>
+    <hr>
+    <script type='text/javascript'>
+      var statusElement = document.getElementById('status');
+      var progressElement = document.getElementById('progress');
+      var spinnerElement = document.getElementById('spinner');
+      var canvasElement = document.getElementById('canvas');
+      var outputElement = document.getElementById('output');
+      if (outputElement) outputElement.value = ''; // clear browser cache
+
+      // As a default initial behavior, pop up an alert when webgl context is lost. To make your
+      // application robust, you may want to override this behavior before shipping!
+      // See http://www.khronos.org/registry/webgl/specs/latest/1.0/#5.15.2
+      canvasElement.addEventListener("webglcontextlost", (e) => {
+        alert('WebGL context lost. You will need to reload the page.');
+        e.preventDefault();
+      }, false);
+
+      var Module = {
+        print(...args) {
+          // These replacements are necessary if you render to raw HTML
+          //text = text.replace(/&/g, "&amp;");
+          //text = text.replace(/</g, "&lt;");
+          //text = text.replace(/>/g, "&gt;");
+          //text = text.replace('\n', '<br>', 'g');
+          console.log(...args);
+          if (outputElement) {
+            var text = args.join(' ');
+            outputElement.value += text + "\n";
+            outputElement.scrollTop = outputElement.scrollHeight; // focus on bottom
+          }
+        },
+        canvas: canvasElement,
+        setStatus(text) {
+          if (!Module.setStatus.last) Module.setStatus.last = { time: Date.now(), text: '' };
+          if (text === Module.setStatus.last.text) return;
+          var m = text.match(/([^(]+)\((\d+(\.\d+)?)\/(\d+)\)/);
+          var now = Date.now();
+          if (m && now - Module.setStatus.last.time < 30) return; // if this is a progress update, skip it if too soon
+          Module.setStatus.last.time = now;
+          Module.setStatus.last.text = text;
+          if (m) {
+            text = m[1];
+            progressElement.value = parseInt(m[2])*100;
+            progressElement.max = parseInt(m[4])*100;
+            progressElement.hidden = false;
+            spinnerElement.hidden = false;
+          } else {
+            progressElement.value = null;
+            progressElement.max = null;
+            progressElement.hidden = true;
+            if (!text) spinnerElement.hidden = true;
+          }
+          statusElement.innerHTML = text;
+        },
+        totalDependencies: 0,
+        monitorRunDependencies(left) {
+          this.totalDependencies = Math.max(this.totalDependencies, left);
+          Module.setStatus(left ? 'Preparing... (' + (this.totalDependencies-left) + '/' + this.totalDependencies + ')' : 'All downloads complete.');
+        }
+      };
+      Module.setStatus('Downloading...');
+      window.onerror = () => {
+        Module.setStatus('Exception thrown, see JavaScript console');
+        spinnerElement.style.display = 'none';
+        Module.setStatus = (text) => {
+          if (text) console.error('[post-exception status] ' + text);
+        };
+      };
+    </script>
+    {{{ SCRIPT }}}
+  </body>
+</html>
\ No newline at end of file