diff --git a/leenkx/Sources/iron/App.hx b/leenkx/Sources/iron/App.hx
index 676932c..1141187 100644
--- a/leenkx/Sources/iron/App.hx
+++ b/leenkx/Sources/iron/App.hx
@@ -52,9 +52,9 @@ class App {
 
 	static function update() {
 		if (Scene.active == null || !Scene.active.ready) return;
-		if (pauseUpdates) return;
 		
 		iron.system.Time.update();
+		if (pauseUpdates) return;
 
 		#if lnx_debug
 		startTime = kha.Scheduler.realTime();
diff --git a/leenkx/Sources/iron/object/ParticleSystem.hx b/leenkx/Sources/iron/object/ParticleSystem.hx
index baeabac..a6b03da 100644
--- a/leenkx/Sources/iron/object/ParticleSystem.hx
+++ b/leenkx/Sources/iron/object/ParticleSystem.hx
@@ -22,10 +22,10 @@ class ParticleSystem {
 	var ready: Bool;
 	var frameRate = 24;
 	var lifetime = 0.0;
+	var looptime = 0.0;
 	var animtime = 0.0;
 	var time = 0.0;
 	var spawnRate = 0.0;
-	var looptime = 0.0;
 	var seed = 0;
 
 	var r: TParticleData;
@@ -124,7 +124,8 @@ class ParticleSystem {
 	
 	public function update(object: MeshObject, owner: MeshObject) {
 		if (!ready || object == null || speed == 0.0) return;
-
+		if (iron.App.pauseUpdates) return;
+		
 		var prevLap = lap;
 
 		// Copy owner world transform but discard scale
diff --git a/leenkx/Sources/iron/system/Time.hx b/leenkx/Sources/iron/system/Time.hx
index 99484eb..1ebc077 100644
--- a/leenkx/Sources/iron/system/Time.hx
+++ b/leenkx/Sources/iron/system/Time.hx
@@ -1,7 +1,13 @@
 package iron.system;
 
 class Time {
-
+	public static var scale = 1.0;
+	
+	static var frequency: Null<Int> = null;
+	static function initFrequency() {
+		frequency = kha.Display.primary != null ? kha.Display.primary.frequency : 60;
+	}
+	
 	public static var step(get, never): Float;
 	static function get_step(): Float {
 		if (frequency == null) initFrequency();
@@ -14,37 +20,39 @@ class Time {
 		return _fixedStep;
 	}
 	
-
 	public static function initFixedStep(value: Float = 1 / 60) {
 		_fixedStep = value;
 	}
 
-
 	static var lastTime = 0.0;
-	public static var delta = 0.0;
-
+	static var _delta = 0.0;
+	public static var delta(get, never): Float;
+	static function get_delta(): Float {
+		return _delta;
+	}
+	
 	static var lastRenderTime = 0.0;
-	public static var renderDelta = 0.0;
+	static var _renderDelta = 0.0;
+	public static var renderDelta(get, never): Float;
+	static function get_renderDelta(): Float {
+		return _renderDelta;
+	}
+		
 	public static inline function time(): Float {
 		return kha.Scheduler.time();
 	}
+	
 	public static inline function realTime(): Float {
 		return kha.Scheduler.realTime();
 	}
 
-	static var frequency: Null<Int> = null;
-
-	static function initFrequency() {
-		frequency = kha.Display.primary != null ? kha.Display.primary.frequency : 60;
-	}
-
 	public static function update() {
-		delta = (realTime() - lastTime) * scale;
+		_delta = realTime() - lastTime;
 		lastTime = realTime();
 	}
 
 	public static function render() {
-		renderDelta = (realTime() - lastRenderTime) * scale;
+		_renderDelta = realTime() - lastRenderTime;
 		lastRenderTime = realTime();
 	}
 }