diff --git a/README.md b/README.md
index bace99d..d5664b4 100644
--- a/README.md
+++ b/README.md
@@ -37,7 +37,7 @@ For now, check out the [example projects](https://github.com/oakes/play-clj-exam
     ; update the screen map to hold a tiled map renderer and a camera
     (update! screen
              :renderer (orthogonal-tiled-map "level1.tmx" (/ 1 8))
-             :camera (orthographic-camera))
+             :camera (orthographic))
     (let [; load a sprite sheet from your resources dir
           sheet (texture "tiles.png")
           ; split the sheet into 16x16 tiles
diff --git a/src/play_clj/core_graphics.clj b/src/play_clj/core_graphics.clj
index 3973753..b0add36 100644
--- a/src/play_clj/core_graphics.clj
+++ b/src/play_clj/core_graphics.clj
@@ -212,27 +212,27 @@
 
 ; cameras
 
-(defn orthographic-camera*
+(defn orthographic*
   []
   (OrthographicCamera.))
 
-(defmacro orthographic-camera
+(defmacro orthographic
   [& options]
-  `(u/calls! ^OrthographicCamera (orthographic-camera*) ~@options))
+  `(u/calls! ^OrthographicCamera (orthographic*) ~@options))
 
-(defmacro orthographic-camera!
+(defmacro orthographic!
   [screen k & options]
   `(u/call! ^OrthographicCamera (:camera ~screen) ~k ~@options))
 
-(defn perspective-camera
+(defn perspective
   []
   (PerspectiveCamera.))
 
-(defmacro perspective-camera
+(defmacro perspective
   [& options]
-  `(u/calls! ^PerspectiveCamera (perspective-camera*) ~@options))
+  `(u/calls! ^PerspectiveCamera (perspective*) ~@options))
 
-(defmacro perspective-camera!
+(defmacro perspective!
   [screen k & options]
   `(u/call! ^PerspectiveCamera (:camera ~screen) ~k ~@options))
 
diff --git a/src/play_clj/g2d_physics.clj b/src/play_clj/g2d_physics.clj
index 0f34e7d..da93a27 100644
--- a/src/play_clj/g2d_physics.clj
+++ b/src/play_clj/g2d_physics.clj
@@ -3,20 +3,20 @@
             [play-clj.utils :as u])
   (:import [com.badlogic.gdx.physics.box2d World]))
 
-(defn world*
+(defn box2d*
   ([]
-    (world* 0 0 true))
+    (box2d* 0 0 true))
   ([gravity-x gravity-y]
-    (world* gravity-x gravity-y true))
+    (box2d* gravity-x gravity-y true))
   ([gravity-x gravity-y sleep?]
     (World. (m/vector-2 gravity-x gravity-y) sleep?)))
 
-(defmacro world
+(defmacro box2d
   [gravity-x gravity-y & options]
-  `(let [object# (world* ~gravity-x ~gravity-y)]
+  `(let [object# (box2d* ~gravity-x ~gravity-y)]
      (u/calls! ^World object# ~@options)
      object#))
 
-(defmacro world!
+(defmacro box2d!
   [{:keys [^World world]} k & options]
   `(u/call! ^World ~world ~k ~@options))