diff --git a/src/play_clj/g2d.clj b/src/play_clj/g2d.clj
index 001493b..5a53af1 100644
--- a/src/play_clj/g2d.clj
+++ b/src/play_clj/g2d.clj
@@ -3,7 +3,7 @@
   (:import [com.badlogic.gdx.graphics Texture]
            [com.badlogic.gdx.graphics.g2d Animation BitmapFont NinePatch
             ParticleEffect TextureAtlas TextureRegion]
-           [play_clj.utils TextureEntity NinePatchEntity ParticleEntity]))
+           [play_clj.utils TextureEntity NinePatchEntity ParticleEffectEntity]))
 
 (defmacro bitmap-font
   "Returns a [BitmapFont](http://libgdx.badlogicgames.com/nightlies/docs/api/com/badlogic/gdx/graphics/g2d/BitmapFont.html)
@@ -90,7 +90,7 @@
 (defn particle-effect*
   "The function version of `particle-effect`"
   []
-  (ParticleEntity. (ParticleEffect.)))
+  (ParticleEffectEntity. (ParticleEffect.)))
 
 (defmacro particle-effect
   "Returns an entity based on [ParticleEffect](http://libgdx.badlogicgames.com/nightlies/docs/api/com/badlogic/gdx/graphics/g2d/ParticleEffect.html)
diff --git a/src/play_clj/utils.clj b/src/play_clj/utils.clj
index df7c6af..fb220da 100644
--- a/src/play_clj/utils.clj
+++ b/src/play_clj/utils.clj
@@ -1,6 +1,7 @@
 (ns play-clj.utils
   (:require [clojure.string :as s])
-  (:import [com.badlogic.gdx.graphics.g2d NinePatch ParticleEffect SpriteBatch
+  (:import [com.badlogic.gdx Gdx Graphics]
+           [com.badlogic.gdx.graphics.g2d NinePatch ParticleEffect SpriteBatch
             TextureRegion]
            [com.badlogic.gdx.graphics.g3d Environment ModelBatch ModelInstance]
            [com.badlogic.gdx.scenes.scene2d Actor]
@@ -194,11 +195,12 @@ new object to be created each time a field is set)
           height (float (or height (.getTotalHeight object)))]
       (.draw object ^SpriteBatch batch x y width height))))
 
-(defrecord ParticleEntity [object] Entity
+(defrecord ParticleEffectEntity [object] Entity
   (draw-entity! [{:keys [^ParticleEffect object x y delta-time]} batch]
     (let [x (float (or x 0))
           y (float (or y 0))
-          delta-time (float delta-time)]
+          ^Graphics g (Gdx/graphics)
+          delta-time (float (or delta-time (.getDeltaTime g)))]
       (.setPosition object x y)
       (.draw object ^SpriteBatch batch delta-time))))