diff --git a/.gitignore b/.gitignore
index 09ee1c5..35e15c1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,7 @@ luac.out
 
 img/*
 img
+up-editor.love
 
 # luarocks build files
 *.src.rock
diff --git a/conf.lua b/conf.lua
index 312cc71..6b39d50 100644
--- a/conf.lua
+++ b/conf.lua
@@ -6,9 +6,12 @@ function love.conf(t)
   t.version = "11.3"
   t.window.width = GAME_WIDTH * scale
   t.window.height = GAME_HEIGHT * scale
+  t.window.vsync = 0
   t.modules.joystick = false
   t.modules.physics = false
   t.modules.touch = false
+  t.modules.timer = false
+  t.modules.sound = false
   t.modules.accelerometerjoystick = false
   t.identity = "up_editor"
   t.window.title = "UP editor"
diff --git a/pack.sh b/pack.sh
new file mode 100755
index 0000000..aaf8707
--- /dev/null
+++ b/pack.sh
@@ -0,0 +1 @@
+zip -9 -r up-editor.love *.ttf *.lua img
diff --git a/tiles.lua b/tiles.lua
index 37564d5..24956f3 100644
--- a/tiles.lua
+++ b/tiles.lua
@@ -2,8 +2,9 @@ local img_path = "img/"
 
 tiles = {
   love.graphics.newImage(img_path.."ground.png"),
+  love.graphics.newImage(img_path.."spike.png"),
   love.graphics.newImage(img_path.."elevator1.png"),
 }
-tiles_char = { '0', '^' }
+tiles_char = { '0', 'v', '^' }
 
 selected_tile = 1