diff -ruN a/compat.lua b/compat.lua
--- /dev/null
+++ b/compat.lua
@@ -0,0 +1,27 @@
+-- Shims so this LOVE 0.10.2 game runs on LOVE 11.x (added by the fredygames port).
+--
+-- * love.graphics.setColor took 0-255 components in 0.10; LOVE 11 takes 0-1.  Every call in this game
+--   still uses 0-255, so setColor is wrapped to divide by 255 (it accepts both the r, g, b, a form and
+--   a table).
+-- * love.filesystem.isFile/isDirectory/exists were removed in 11 in favour of getInfo.
+
+local setColor = love.graphics.setColor
+function love.graphics.setColor(r, g, b, a)
+    if type(r) == 'table' then
+        r, g, b, a = r[1], r[2], r[3], r[4]
+    end
+    setColor(r / 255, g / 255, b / 255, (a or 255) / 255)
+end
+
+local fs = love.filesystem
+function fs.isFile(path)
+    local info = fs.getInfo(path)
+    return info ~= nil and info.type == 'file'
+end
+function fs.isDirectory(path)
+    local info = fs.getInfo(path)
+    return info ~= nil and info.type == 'directory'
+end
+function fs.exists(path)
+    return fs.getInfo(path) ~= nil
+end
diff -ruN a/conf.lua b/conf.lua
--- a/conf.lua
+++ b/conf.lua
@@ -1,6 +1,6 @@
 function love.conf(t)
     t.title = "Lunar Depot 38"
-    t.version = "0.10.2"
+    t.version = "11.5"
     t.window.width = 800
     t.window.height = 600
     t.window.resizable = false
diff -ruN a/klinklang/scenes/dead.lua b/klinklang/scenes/dead.lua
--- a/klinklang/scenes/dead.lua
+++ b/klinklang/scenes/dead.lua
@@ -51,7 +51,7 @@
     love.graphics.draw(line1, (w - line1:getWidth()) / 2, h / 2 - line_height * 1.5)
 
     local line2 = love.graphics.newText(m5x7)
-    line2:set{{255, 255, 255}, "press ", {52, 52, 52}, "R", {255, 255, 255}, " to restart"}
+    line2:set{{1, 1, 1}, "press ", {52 / 255, 52 / 255, 52 / 255}, "R", {1, 1, 1}, " to restart"}
     local prefixlen = m5x7:getWidth("press ")
     local keylen = m5x7:getWidth("R")
     local quad = love.graphics.newQuad(384, 0, 32, 32, p8_spritesheet:getDimensions())
@@ -60,7 +60,7 @@
     love.graphics.draw(line2, (w - line2:getWidth()) / 2, h / 2 - line_height / 2)
 
     if worldscene.player.ptrs.savepoint then
-        line2:set{{255, 255, 255}, "press ", {52, 52, 52}, "E", {255, 255, 255}, " to resurrect"}
+        line2:set{{1, 1, 1}, "press ", {52 / 255, 52 / 255, 52 / 255}, "E", {1, 1, 1}, " to resurrect"}
         local keylen = m5x7:getWidth("E")
         local quad = love.graphics.newQuad(384, 0, 32, 32, p8_spritesheet:getDimensions())
         love.graphics.setColor(255, 255, 255)
diff -ruN a/klinklang/scenes/world.lua b/klinklang/scenes/world.lua
--- a/klinklang/scenes/world.lua
+++ b/klinklang/scenes/world.lua
@@ -369,7 +369,10 @@
 end
 
 function WorldScene:_draw_final_canvas()
+    -- LOVE 11 wants canvases drawn with premultiplied alpha
+    love.graphics.setBlendMode('alpha', 'premultiplied')
     love.graphics.draw(self.canvas, 0, 0, 0, self.scale, self.scale)
+    love.graphics.setBlendMode('alpha')
 end
 
 function WorldScene:_draw_actors(actors)
diff -ruN a/ld38/scenes/transition.lua b/ld38/scenes/transition.lua
--- a/ld38/scenes/transition.lua
+++ b/ld38/scenes/transition.lua
@@ -56,7 +56,9 @@
 function TransitionScene:draw()
     self.wrapped:draw()
 
+    love.graphics.setBlendMode('alpha', 'premultiplied')
     love.graphics.draw(self.canvas, self.x, self.y)
+    love.graphics.setBlendMode('alpha')
 end
 
 
diff -ruN a/ld38/scenes/world.lua b/ld38/scenes/world.lua
--- a/ld38/scenes/world.lua
+++ b/ld38/scenes/world.lua
@@ -193,7 +193,7 @@
             // sky_exclusion -- exclusion (difference squared)
             // doesn't get parallax since it's just a solid color, no texture
             next_pixel = Texel(sky_exclusion, new_coords);
-            next_pixel = vec4(pixel.rgb + next_pixel.rgb - 2 * pixel.rgb * next_pixel.rgb, next_pixel.a);
+            next_pixel = vec4(pixel.rgb + next_pixel.rgb - 2.0 * pixel.rgb * next_pixel.rgb, next_pixel.a);
             pixel = blend_normal(pixel, next_pixel);
 
             // big_stars -- soft light
@@ -230,7 +230,7 @@
 
         vec4 effect(vec4 color, Image texture, vec2 tex_coords, vec2 screen_coords) {
             vec4 tex_color = Texel(texture, tex_coords);
-            float gray = (tex_color.r + tex_color.g + tex_color.b) / 3;
+            float gray = (tex_color.r + tex_color.g + tex_color.b) / 3.0;
             vec3 desaturated = mix(tex_color.rgb, vec3(gray), amount);
             return vec4(desaturated, tex_color.a) * color;
         }
diff -ruN a/main.lua b/main.lua
--- a/main.lua
+++ b/main.lua
@@ -1,3 +1,5 @@
+require 'compat'
+
 local utf8 = require 'utf8'
 
 local baton = require 'vendor.baton'
@@ -186,8 +188,6 @@
     m5x7small = love.graphics.newFont('assets/fonts/glip.ttf', 16)
     glipfontbig = love.graphics.newFont('assets/fonts/glip.ttf', 72)
 
-    love.joystick.loadGamepadMappings("vendor/gamecontrollerdb.txt")
-
     -- FIXME things i would like to have here:
     -- - cleverly scale axis inputs like that other thing, and limit them to a circular range as well?
     -- - use scancodes by default!!!  the examples use keys