diff --git a/scripts/challengeresult.lua b/scripts/challengeresult.lua
index 3d381bc..533ee17 100644
--- a/scripts/challengeresult.lua
+++ b/scripts/challengeresult.lua
@@ -75,8 +75,8 @@ local gradeImages = {
     none = gfx.CreateSkinImage("common/grades/none.png", 0),
 }
 
-local percRequired = 1;
-local percGet = 0;
+local percRequired = nil;
+local percGet = nil;
 
 -- AUDIO
 game.LoadSkinSample("challenge_result.wav")
@@ -161,7 +161,7 @@ function drawChartResult(deltaTime, x, y, chartResult)
     gfx.GlobalAlpha(1);
     gfx.Text(chartResult.title, x+160,y+32);
 
-    DiffRectangle.render(deltaTime, x+287.5, y+67, 0.85, chartResult.difficulty, chartResult.level)
+    DiffRectangle.render(deltaTime, x+287.5, y+67, 0.85, chartResult.difficulty+1, chartResult.level)
 
     local score = chartResult.score or 0;
 
@@ -215,8 +215,11 @@ function drawCompletion()
     gfx.BeginPath()
     gfx.ImageRect(63, 1331, 766*0.85, 130*0.85, completitionImage, 1, 0)
 
-    Numbers.draw_number(925, 1370, 1.0, percGet, 3, scoreNumber, true, 0.3, 1.12)
+    if (percRequired == nil) then
+        return
+    end
 
+    Numbers.draw_number(925, 1370, 1.0, percGet, 3, scoreNumber, true, 0.3, 1.12)
 
     gfx.BeginPath();
     gfx.Rect(741, 1402, 278*math.min(1, percGet / percRequired), 6);
@@ -226,7 +229,13 @@ end
 
 
 function result_set()
+    if (result.requirement_text == nil) then
+        return
+    end
+
     local reqTextWords = common.split(result.requirement_text, ' ');
+
+
     for index, word in ipairs(reqTextWords) do
         if string.find(word, '%%') ~= nil then -- %% = %, because % is an escape char
             local percNumber = tonumber(string.gsub(word, '%%', ''), 10)
@@ -234,6 +243,10 @@ function result_set()
         end
     end
 
+    if (percRequired == nil) then
+        return
+    end
+
     game.Log(percRequired, game.LOGGER_ERROR);
 
     local a = 0;
diff --git a/scripts/common/util.lua b/scripts/common/util.lua
index 039a8bf..e7ab595 100644
--- a/scripts/common/util.lua
+++ b/scripts/common/util.lua
@@ -1,5 +1,5 @@
 local function split(s, delimiter)
-    result = {};
+    local result = {};
     for match in (s..delimiter):gmatch("(.-)"..delimiter) do
         table.insert(result, match);
     end