diff --git a/Gemfile b/Gemfile
index 89576b9..b57046b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,4 +2,4 @@ source "https://rubygems.org"
 gem "opengl-bindings"
 gem "glu"
 # gem "glut"
-gem "gosu"
+gem "gosu"
\ No newline at end of file
diff --git a/i-mic-fps.rb b/i-mic-fps.rb
index 7b0b509..12359f7 100644
--- a/i-mic-fps.rb
+++ b/i-mic-fps.rb
@@ -63,4 +63,18 @@ require_relative "lib/window"
 
 MODEL_METER_SCALE = 0.001 # Objects exported from blender using the millimeter object scale will be close to 1 GL unit
 
-IMICFPS::Window.new.show
+
+if ARGV.join.include?("--profile")
+  begin
+    require "ruby-prof"
+    RubyProf.start
+      IMICFPS::Window.new.show
+    result  = RubyProf.stop
+    printer = RubyProf::MultiPrinter.new(result)
+    printer.print(path: ".", profile: "profile", min_percent: 2)
+  rescue LoadError
+    puts "ruby-prof not installed!"
+  end
+else
+  IMICFPS::Window.new.show
+end
diff --git a/lib/objects/player.rb b/lib/objects/player.rb
index 788910a..2355983 100644
--- a/lib/objects/player.rb
+++ b/lib/objects/player.rb
@@ -9,7 +9,7 @@ class IMICFPS
     def setup
       bind_model(ModelLoader.new(type: :obj, file_path: "objects/biped.obj", game_object: self))
       @speed = 2.5 # meter's per second
-      @running_speed = 6.8
+      @running_speed = 6.8 # meter's per second
       @old_speed = @speed
       @mass = 72 # kg
       @y_velocity = 0
diff --git a/lib/objects/tree.rb b/lib/objects/tree.rb
index 21be33f..9fbb820 100644
--- a/lib/objects/tree.rb
+++ b/lib/objects/tree.rb
@@ -2,7 +2,10 @@ class IMICFPS
   class Tree < GameObject
     def setup
       bind_model(ModelLoader.new(type: :obj, file_path: "objects/tree.obj", game_object: self))
-      self.y = @terrain.height_at(self)
+      vert = @terrain.find_nearest_vertex(self)
+      self.x = vert.x
+      self.y = vert.y
+      self.z = vert.z
     end
 
     # def update
diff --git a/lib/window.rb b/lib/window.rb
index d63b0f1..559ba78 100644
--- a/lib/window.rb
+++ b/lib/window.rb
@@ -26,7 +26,6 @@ class IMICFPS
       @skydome = Skydome.new(scale: 0.08, backface_culling: false, auto_manage: false)
 
       25.times do
-        p @terrain.width
         Tree.new(x: rand(@terrain.width)-(@terrain.width/2.0), z: rand(@terrain.depth)-(@terrain.depth/2.0), terrain: @terrain)
       end
       # Tree.new(x: 1, z: -5, terrain: @terrain)