diff --git a/app/assets/json/global/app-menu-map.json b/app/assets/json/global/app-menu-map.json
index 2565a0c..dafa1cd 100644
--- a/app/assets/json/global/app-menu-map.json
+++ b/app/assets/json/global/app-menu-map.json
@@ -1,4 +1,24 @@
 [
+    {
+        "label": "Simulations Management",
+        "icon": "icon-lab2",
+        "collapsed": true,
+        "access": ["*"],
+        "items": [
+            {
+                "label": "Create a simulation",
+                "icon": "icon-new",
+                "route": "/sims/create",
+                "access": ["*"]
+            },
+            {
+                "label": "Play / Pause a simulation",
+                "icon": "icon-file-play",
+                "route": "/sims/manage",
+                "access": ["*"]
+            }
+        ]
+    },
     {
         "label": "Live Arena",
         "icon": "icon-bolt",
diff --git a/app/assets/styles/app.css b/app/assets/styles/app.css
index ff14390..a52b06f 100755
--- a/app/assets/styles/app.css
+++ b/app/assets/styles/app.css
@@ -27,6 +27,7 @@
     
     --app-menu-collapsed-width: 50px;
     --app-menu-expanded-width: 160px;
+    --app-menu-hover-max-width: 400px;
 
     --app-menu-width: var(--app-menu-expanded-width);
 
@@ -80,6 +81,53 @@ menu[eicmenu] [menuitem] > a > i, menu[eicmenu] [menuitem] > .nolink > i{
 menu[eicmenu] [menuitem] > a > button, menu[eicmenu] [menuitem] > .nolink button {
     background: var(--app-color-primary);
 }
+
+/* Submenu vertical expand/collapse (overrides EICUI height:0 which breaks transitions) */
+menu[eicmenu].app-menu > [menuitem] > ul {
+    max-height: 30rem;
+    height: auto !important;
+    overflow: hidden;
+    transition: max-height 0.6s ease-in-out, opacity 0.3s ease-in-out, padding 0.3s ease-in-out;
+}
+menu[eicmenu].app-menu > [menuitem] > ul[collapsed] {
+    max-height: 0;
+    height: auto !important;
+    padding-top: 0;
+    padding-bottom: 0;
+}
+
+/* Collapsed app menu: show main section icons, hide sub-entries */
+menu[eicmenu].app-menu[collapsed] {
+    width: max-content;
+    transition: max-width 0.3s ease-in-out;
+}
+menu[eicmenu].app-menu[collapsed]:not(:hover) {
+    max-width: var(--app-menu-collapsed-width);
+    overflow-x: hidden;
+}
+menu[eicmenu].app-menu[collapsed]:hover {
+    max-width: var(--app-menu-hover-max-width);
+    overflow-x: hidden;
+}
+menu[eicmenu].app-menu[collapsed]:not(:hover) > [menuitem] > .nolink {
+    display: flex;
+    justify-content: center;
+    padding: var(--eicui-base-spacing-xs);
+}
+menu[eicmenu].app-menu[collapsed]:not(:hover) > [menuitem] > .nolink > label,
+menu[eicmenu].app-menu[collapsed]:not(:hover) > [menuitem] > .nolink > button {
+    display: none;
+}
+menu[eicmenu].app-menu[collapsed]:not(:hover) > [menuitem] > .nolink > i {
+    font-size: larger;
+    margin: 0;
+}
+menu[eicmenu].app-menu[collapsed]:not(:hover) > [menuitem] > ul {
+    max-height: 0 !important;
+    opacity: 0;
+    padding: 0;
+}
+
 [eicapp] .app-workspace {
     display: grid;
     /*
@@ -366,7 +414,7 @@ input{
     padding-left: 1em;
     box-sizing: border-box;
     height: 2em;
-    background-color: #6B5;
+    background-color: #CFC;
     border: none;
 }
 
@@ -382,14 +430,19 @@ bz-select > button{
     color:#EEE;
 }
 bz-select > button::after{ color:#EEE; }
-bz-select option{
+bz-select option,
+div.options-container.portaled option{
     background-color: #676;
     color: #EEE;
 }
-bz-select option i{ margin-right:0.3em; }
-bz-select option i.icon-atom1{ color:#FF4; }
-bz-select option i.icon-bug{ color:#4DF; }
-bz-select > div.options-container.open { max-height: 20em; }
+bz-select option i,
+div.options-container.portaled option i{ margin-right:0.3em; }
+bz-select option i.icon-atom1,
+div.options-container.portaled option i.icon-atom1{ color:#FF4; }
+bz-select option i.icon-bug,
+div.options-container.portaled option i.icon-bug{ color:#4DF; }
+bz-select > div.options-container.open,
+div.options-container.portaled.open { max-height: 20em; }
 bz-toggler div.toggle-switch span.toggle-bar { background-color: #473; }
 bz-toggler div.toggle-switch span.toggle-thumb { background-color:#9D8; }
 
diff --git a/app/config/baseRoutes.json b/app/config/baseRoutes.json
index 304cbe2..97ea373 100755
--- a/app/config/baseRoutes.json
+++ b/app/config/baseRoutes.json
@@ -20,6 +20,11 @@
         "url": "/editors",
         "role": [ "*" ],
         "controller" : "/editors/EditorsController"
+    },
+    {
+        "url": "/sims",
+        "role": [ "*" ],
+        "controller" : "/sims/SimsController"
     },    
     {
         "url": "/system",
diff --git a/app/controllers/sims/SimsController.js b/app/controllers/sims/SimsController.js
new file mode 100644
index 0000000..07cd9dd
--- /dev/null
+++ b/app/controllers/sims/SimsController.js
@@ -0,0 +1,51 @@
+
+
+class SimsController extends WindozController {
+
+    constructor(params) {
+        super(params)
+    }
+
+    async create() {
+        const models = {
+            sims: new SimsModel('/sims'),
+            keyframes: new KeyframesModel('/keyframes')
+        }
+
+        this.loadWindow(
+            'sims/CreateSimView',
+            {
+                title: '<i class="icon-new"></i> Create a simulation',
+                static: true,
+                expanded: false,
+                withSettings: false,
+                windowStyle: WindozDomContent.boxFromPrefs('sims.createsimview', { x: 50, y: 50, w: 800, h: 600 }),
+            },
+            {
+                models: models,
+            }
+        )
+    }
+
+    async manage() {
+        const models = {
+            sims: new SimsModel('/sims')
+        }
+
+        this.loadWindow(
+            'sims/ManageSimView',
+            {
+                title: '<i class="icon-file-play"></i> Play / Pause a simulation',
+                static: true,
+                expanded: false,
+                withSettings: false,
+                windowStyle: WindozDomContent.boxFromPrefs('sims.managesimview', { x: 50, y: 50, w: 800, h: 600 }),
+            },
+            {
+                models: models,
+            }
+        )
+    }
+}
+
+app.registerClass('SimsController', SimsController)
diff --git a/app/controllers/sims/SimsController.json b/app/controllers/sims/SimsController.json
new file mode 100644
index 0000000..8d6a420
--- /dev/null
+++ b/app/controllers/sims/SimsController.json
@@ -0,0 +1,36 @@
+{
+    "routes": [
+        {
+            "url": "/create",
+            "role": [ "*" ],
+            "controller" : "/sims/SimsController",
+            "method": "create"
+        },
+        {
+            "url": "/manage",
+            "role": [ "*" ],
+            "controller" : "/sims/SimsController",
+            "method": "manage"
+        }
+    ],
+    "models": [
+        "SimsModel",
+        "KeyframesModel"
+    ],
+    "views": [
+        "sims/CreateSimView",
+        "sims/ManageSimView"
+    ],
+    "controllerDependencies": [
+        "/helpers/basicDialogs",
+        "/helpers/activeAttributes"
+    ],
+    "assets": {
+        "styles": [
+        ],
+        "html": [
+        ],
+        "json": [
+        ]
+    }
+}
diff --git a/app/models/SimsModel.js b/app/models/SimsModel.js
new file mode 100644
index 0000000..c568196
--- /dev/null
+++ b/app/models/SimsModel.js
@@ -0,0 +1,34 @@
+class SimsModel extends WindozModel {
+
+    constructor() {
+        super()
+        this.ressource = '/sims'
+    }
+
+    async list() {
+        // TODO: implement
+        return([])
+    }
+
+    async get(simId) {
+        // TODO: implement
+        return(null)
+    }
+
+    async create(simData) {
+        // TODO: implement
+        return(null)
+    }
+
+    async start(simId) {
+        // TODO: implement
+        return(null)
+    }
+
+    async pause(simId) {
+        // TODO: implement
+        return(null)
+    }
+}
+
+app.registerClass('SimsModel', SimsModel)
diff --git a/app/thirdparty/buildoz b/app/thirdparty/buildoz
index 7f4e13c..9690401 160000
--- a/app/thirdparty/buildoz
+++ b/app/thirdparty/buildoz
@@ -1 +1 @@
-Subproject commit 7f4e13c5e0f65f729fc2a306054e7d3b07f08328
+Subproject commit 9690401daddbeff48b6228b622f824def06391a4
diff --git a/app/views/editors/KeyframeView.js b/app/views/editors/KeyframeView.js
index 65e6ad4..fba67c8 100644
--- a/app/views/editors/KeyframeView.js
+++ b/app/views/editors/KeyframeView.js
@@ -68,6 +68,15 @@ class KeyframeView extends WindozDomContent {
         this.kfArena = new app.LoadedModules.kfArena(this.outputs.kfArenaCanvas, this.agentSprites)
         this.kfArena.onclickAgent = this.onclickAgent.bind(this)
         this.kfArena.startRendering()
+
+        this.output('settingsMenu', app.Assets.Store.html.spaceViewSetting)
+        this.outputs.settingsMenu.querySelectorAll('input[type="toggler"]').forEach(el => {
+            const tog = new InputToggler(el)
+            if(this.kfArena[tog._el.name]?.layers){
+                tog.value = this.kfArena.camera.layers.test(this.kfArena[tog._el.name].layers) ? 'yes' : 'no'
+            }
+            tog.onToggle = this.settingsToggle.bind(this)
+        })
        
         this.outputs.btnAddAgent.disabled = true
         this.outputs.btnRemoveAgent.disabled = true
@@ -77,6 +86,17 @@ class KeyframeView extends WindozDomContent {
         this.currentlySelectedAid = null
     }
 
+    settingsToggle(value, object){
+        if(['grid','axes'].includes(object._el.name)){
+            const layerId = {'grid':1,'axes':2}[object._el.name]
+            if(value=='yes'){
+                this.kfArena.camera.layers.enable(layerId)
+            } else {
+                this.kfArena.camera.layers.disable(layerId)
+            }
+        }
+    }
+
     deselectSceneAgent(){
         if(!this.currentlySelectedAid) return
         const obj3D = this.kfArena.scene.getObjectByName(this.currentlySelectedAid)
diff --git a/app/views/sims/CreateSimView.html b/app/views/sims/CreateSimView.html
new file mode 100644
index 0000000..ddbd0af
--- /dev/null
+++ b/app/views/sims/CreateSimView.html
@@ -0,0 +1,25 @@
+<style>
+    .create-sim section {
+        padding: 1em;
+    }
+    .create-sim bz-select[data-output="keyframesSelector"] {
+        margin-top: 1em;
+    }
+    .create-sim .cols-2 { align-items: baseline; }
+</style>
+<article eiccard class="create-sim">
+    <header>
+        <h1>Create a simulation</h1>
+    </header>
+    <section>
+        <div class="cols-2">
+            <label>Simulation first keyframe:</label>
+            <bz-select label="Existing keyframes..." data-output="keyframesSelector"></bz-select>
+        </div>
+        <div class="cols-2">
+            <label>Simulation Name:</label>
+            <input type="text" data-output="simName" placeholder="(min 5 chars)"/>
+        </div>
+        <button eicbutton rounded data-output="btnCreateSim" data-trigger="onCreateSim">Create Simulation</button>
+    </section>
+</article>
diff --git a/app/views/sims/CreateSimView.js b/app/views/sims/CreateSimView.js
new file mode 100644
index 0000000..de6a621
--- /dev/null
+++ b/app/views/sims/CreateSimView.js
@@ -0,0 +1,30 @@
+class CreateSimView extends WindozDomContent {
+
+    constructor() {
+        super()
+        Object.assign(this, app.helpers.activeAttributes, app.helpers.basicDialogs)
+    }
+
+    async DOMContentLoaded(options) {
+        this.models = options.models
+        const components = ui.eicfy(this.el)
+        this.setupRefs(components)
+
+        this.models.keyframes.list('', null).then(data => data.payload).then(kflist => {
+            this.outputs.keyframesSelector.fillOptions(kflist.map(item => {
+                return({
+                    markup: item.ekf_name,
+                    value: item.ekf_uuid
+                })
+            }))
+        })
+        this.outputs.keyframesSelector.addEventListener('change', this.onChangeKeyframe.bind(this))
+    }
+
+    onChangeKeyframe(event) {
+        if(!this.outputs.keyframesSelector.value) return
+        // TODO: use selected keyframe for simulation creation
+    }
+}
+
+app.registerClass('CreateSimView', CreateSimView)
diff --git a/app/views/sims/ManageSimView.html b/app/views/sims/ManageSimView.html
new file mode 100644
index 0000000..b49391a
--- /dev/null
+++ b/app/views/sims/ManageSimView.html
@@ -0,0 +1,8 @@
+<article eiccard class="manage-sim">
+    <header>
+        <h1>Play / Pause a simulation</h1>
+    </header>
+    <section>
+        <p>TODO: simulation play / pause controls</p>
+    </section>
+</article>
diff --git a/app/views/sims/ManageSimView.js b/app/views/sims/ManageSimView.js
new file mode 100644
index 0000000..71fbb7e
--- /dev/null
+++ b/app/views/sims/ManageSimView.js
@@ -0,0 +1,15 @@
+class ManageSimView extends WindozDomContent {
+
+    constructor() {
+        super()
+        Object.assign(this, app.helpers.basicDialogs)
+    }
+
+    async DOMContentLoaded(options) {
+        this.models = options.models
+        ui.eicfy(this.el)
+        // TODO: implement
+    }
+}
+
+app.registerClass('ManageSimView', ManageSimView)
diff --git a/doc/prompts_blobs.txt b/doc/prompts_blobs.txt
new file mode 100644
index 0000000..5ce199c
--- /dev/null
+++ b/doc/prompts_blobs.txt
@@ -0,0 +1,5 @@
+In SPARC, the app menu is created from app/assets/json/global/app-menu-map.json
+Each entry defines a route.
+A "high level" route is then configured in app/config/baseRoutes.json that delegates a group of URLs to a controller. 
+Then, a controller, in its associated .json file defines in its "routes" section the sub-route managed by the controller, 
+and the method to be called inside that controller.
\ No newline at end of file