diff --git a/config.nims b/config.nims
index 55a64b3..c180457 100644
--- a/config.nims
+++ b/config.nims
@@ -23,7 +23,7 @@ when defined( emscripten ):
   --panics:on
   --exceptions:goto
   --define:noSignalHandler
-  # --passL:"-Oz" # Production bu ld
+  --passL:"-Oz" # Production build
   # --passL:"-O0 -gDebug -gsource-map" # Debug build
   --passL:"-s EXPORT_ES6"
   --passL:"-s EXPORT_NAME=NimTest"
diff --git a/resources/config.ini b/resources/config.ini
index f56f523..798314f 100644
--- a/resources/config.ini
+++ b/resources/config.ini
@@ -1,5 +1,4 @@
 
 [Performance]
-# In milliseconds
-tick = 1000
+fps = 60
 
diff --git a/src/nim_wasm_test.nim b/src/nim_wasm_test.nim
index 935a87e..d7c3b9a 100644
--- a/src/nim_wasm_test.nim
+++ b/src/nim_wasm_test.nim
@@ -1,7 +1,6 @@
 # vim: set et sta sw=4 ts=4 :
 
 import
-    std/os,
     std/parsecfg,
     std/strformat,
     std/strutils
@@ -10,18 +9,15 @@ import raylib
 var conf: Config
 try:
     conf = loadConfig( "resources/config.ini" )
-except IOError as err:
+except IOError:
     echo "No config file, using defaults."
     conf = newConfig()
 
-when defined( emscripten ):
-    var tick = conf.getSectionValue( "Performance", "tick", defaultVal = "10").parseInt.cuint
-else:
-    var tick = conf.getSectionValue( "Performance", "tick", defaultVal = "10").parseInt
+var fps = conf.getSectionValue( "Performance", "fps", defaultVal = "60").parseInt
 
 # Emscripten specific imports
 proc emscripten_set_main_loop( f: proc() {.cdecl.}, a: cint, b: bool ) {.importc.}
-proc emscripten_sleep( a: cuint ) {.importc.}
+# proc emscripten_sleep( a: cuint ) {.importc.}
 
 var camera = Camera(
     position: Vector3(x: 5, y: 5, z: 10),  # Camera position
@@ -45,6 +41,7 @@ proc mainLoop() {.cdecl.} =
     defer: closeWindow()
 
     initWindow( 800, 600, "raylib nim playground" )
+    setTargetFPS( fps.int32 );
 
     var count = 0
 
@@ -62,11 +59,6 @@ proc mainLoop() {.cdecl.} =
 
         count = count + 1
 
-        when defined( emscripten ):
-            emscripten_sleep( tick )
-        else:
-            sleep( tick )
-
 
 when defined( emscripten ):
     emscripten_set_main_loop( mainLoop, 0, true );