--- a/main.lua
+++ b/main.lua
@@ -115,8 +115,6 @@
     love.graphics.setFont(m5x7)
     m5x7small = love.graphics.newFont('assets/fonts/m5x7.ttf', 16 * 1)
 
-    love.joystick.loadGamepadMappings("vendor/gamecontrollerdb.txt")
-
     worldscene = WorldScene()
 
     Gamestate.registerEvents()
--- a/neonphase/glitch.lua
+++ b/neonphase/glitch.lua
@@ -9,16 +9,15 @@
 -- pauses or dialogue
 function Glitch:init()
     local shader = love.graphics.newShader([[
-        extern int y_bands;  // number of horizontal bands
-        extern int y_chunk;  // how many bands constitute a chunk
-        extern int y_min;
-        extern int y_max;  // which bands in each chunk are distorted
+        extern float y_bands;  // number of horizontal bands
+        extern float y_chunk;  // how many bands constitute a chunk
+        extern float y_min;
+        extern float y_max;  // which bands in each chunk are distorted
         extern float y_offset;  // 0-1, how much to offset y by before sining
         extern float x_distortion;  // how much to offset x (in TEXTURES, not pixels!)
 
         vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 screen_coords) {
-            int y = int(texture_coords.y * y_bands);
-            while (y >= y_chunk) y -= y_chunk;
+            float y = mod(floor(texture_coords.y * y_bands), y_chunk);
             if (y_min <= y && y <= y_max) {
                 texture_coords.x += x_distortion * sin((texture_coords.y * y_bands + y_offset) * 6.28);
             }