diff --git a/ColourMeOKGame/.idea/.idea.ColourMeOKGame/.idea/inspectionProfiles/Project_Default.xml b/ColourMeOKGame/.idea/.idea.ColourMeOKGame/.idea/inspectionProfiles/Project_Default.xml
new file mode 100644
index 0000000..ebdfbd6
--- /dev/null
+++ b/ColourMeOKGame/.idea/.idea.ColourMeOKGame/.idea/inspectionProfiles/Project_Default.xml
@@ -0,0 +1,6 @@
+<component name="InspectionProjectProfileManager">
+  <profile version="1.0">
+    <option name="myName" value="Project Default" />
+    <inspection_tool class="MarkdownNoTableBorders" enabled="true" level="WARNING" enabled_by_default="true" />
+  </profile>
+</component>
\ No newline at end of file
diff --git a/ColourMeOKGame/Assets/Scenes/GameScene.unity b/ColourMeOKGame/Assets/Scenes/GameScene.unity
index c80fb31..87fe1f5 100644
--- a/ColourMeOKGame/Assets/Scenes/GameScene.unity
+++ b/ColourMeOKGame/Assets/Scenes/GameScene.unity
@@ -143,7 +143,7 @@ GameObject:
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
   m_StaticEditorFlags: 0
-  m_IsActive: 0
+  m_IsActive: 1
 --- !u!114 &133964671
 MonoBehaviour:
   m_ObjectHideFlags: 0
@@ -258,7 +258,7 @@ GameObject:
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
   m_StaticEditorFlags: 0
-  m_IsActive: 0
+  m_IsActive: 1
 --- !u!4 &447905427
 Transform:
   m_ObjectHideFlags: 0
@@ -476,7 +476,7 @@ GameObject:
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
   m_StaticEditorFlags: 0
-  m_IsActive: 0
+  m_IsActive: 1
 --- !u!114 &1204483825
 MonoBehaviour:
   m_ObjectHideFlags: 0
@@ -505,37 +505,6 @@ Transform:
   m_Children: []
   m_Father: {fileID: 0}
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
---- !u!1 &1680304394
-GameObject:
-  m_ObjectHideFlags: 0
-  m_CorrespondingSourceObject: {fileID: 0}
-  m_PrefabInstance: {fileID: 0}
-  m_PrefabAsset: {fileID: 0}
-  serializedVersion: 6
-  m_Component:
-  - component: {fileID: 1680304395}
-  m_Layer: 0
-  m_Name: GameObject
-  m_TagString: Untagged
-  m_Icon: {fileID: 0}
-  m_NavMeshLayer: 0
-  m_StaticEditorFlags: 0
-  m_IsActive: 1
---- !u!4 &1680304395
-Transform:
-  m_ObjectHideFlags: 0
-  m_CorrespondingSourceObject: {fileID: 0}
-  m_PrefabInstance: {fileID: 0}
-  m_PrefabAsset: {fileID: 0}
-  m_GameObject: {fileID: 1680304394}
-  serializedVersion: 2
-  m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
-  m_LocalPosition: {x: 0, y: 0, z: 0}
-  m_LocalScale: {x: 1, y: 1, z: 1}
-  m_ConstrainProportionsScale: 0
-  m_Children: []
-  m_Father: {fileID: 0}
-  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!1660057539 &9223372036854775807
 SceneRoots:
   m_ObjectHideFlags: 0
@@ -545,4 +514,3 @@ SceneRoots:
   - {fileID: 133964672}
   - {fileID: 447905427}
   - {fileID: 1204483826}
-  - {fileID: 1680304395}
diff --git a/ColourMeOKGame/Assets/Scripts/Backend.cs b/ColourMeOKGame/Assets/Scripts/Backend.cs
index 3daf4e4..b9a558f 100644
--- a/ColourMeOKGame/Assets/Scripts/Backend.cs
+++ b/ColourMeOKGame/Assets/Scripts/Backend.cs
@@ -546,7 +546,7 @@ public void GetRecentScores(Action<DatabaseTransactionResult, List<LocalPlayerDa
                     }
                     catch (Exception e)
                     {
-                        Debug.LogError(e);
+                        Debug.LogError($"{e}\n{child.GetRawJsonValue()}");
                     }
                 }
 
diff --git a/ColourMeOKGame/Assets/Scripts/Colorimetry.cs b/ColourMeOKGame/Assets/Scripts/Colorimetry.cs
index 2819747..fd8ad44 100644
--- a/ColourMeOKGame/Assets/Scripts/Colorimetry.cs
+++ b/ColourMeOKGame/Assets/Scripts/Colorimetry.cs
@@ -3,13 +3,48 @@
 
 public static class Colorimetry
 {
+    /// <summary>
+    ///     calculate a similarity percentage from a colour distance
+    /// </summary>
+    /// <param name="delta">
+    ///     the <c>DeltaLabChE</c> object returned by <c>CalculateDistance</c>,
+    /// </param>
+    /// <param name="chromaMax">
+    ///     the maximum chroma value to use for the similarity percentage calculation,
+    ///     defaults to 1.0f
+    /// </param>
+    /// <param name="hueMax">
+    ///     the maximum hue value to use for the similarity percentage calculation,
+    ///     defaults to 1.0f
+    /// </param>
+    /// <param name="lightnessMax">
+    ///     the maximum lightness value to use for the similarity percentage calculation,
+    ///     defaults to 1.0f
+    /// </param>
+    /// <returns>a <c>LCh</c> struct with 0-1f values</returns>
+    public static LCh CalculateLChSimilarityPercentage(
+        DeltaLabChE delta,
+        double chromaMax = 1.0d,
+        double hueMax = 1.0d,
+        double lightnessMax = 1.0d)
+    {
+        // dL = [-1, 1]         lightness difference (negative = template is darker)
+        // dC = [-inf, +inf]    chroma difference (negative = template is more chromatic)
+        // dH = [0, +inf]       hue difference (zero for grayscale or similar hues)
+        // dE = [0, 1]          overall perceptual difference in the oklab colour space
+        // (but since we're using sRGB, we just use 1.0f as the max bounds)
+        return new LCh((float)Math.Clamp(1 - Math.Abs(delta.dL) / lightnessMax, 0, 1),
+            (float)Math.Clamp(1 - Math.Abs(delta.dC) / chromaMax, 0, 1),
+            (float)Math.Clamp(1 - delta.dh / hueMax, 0, 1));
+    }
+
     /// <summary>
     ///     calculate a 0-100% distance/accuracy between two unity rgba colour objects
     /// </summary>
     /// <param name="template">the template colour to compare against</param>
     /// <param name="response">the response colour to compare</param>
-    /// <returns>a <c>DeltaLabCHE</c> struct</returns>
-    public static DeltaLabCHE CalculateDistance(Color template, Color response)
+    /// <returns>a <c>DeltaLabChE</c> struct</returns>
+    public static DeltaLabChE CalculateDistance(Color template, Color response)
     {
         // rgb to oklab
         var templateOklab = linear_srgb_to_oklab(new RGB(
@@ -48,7 +83,7 @@ public static DeltaLabCHE CalculateDistance(Color template, Color response)
         var deltaH = Math.Max(0d, Math.Sqrt(deltaA * deltaA + deltaB * deltaB - deltaC * deltaC));
         var deltaE = Math.Sqrt(deltaL * deltaL + deltaC * deltaC + deltaH * deltaH);
 
-        return new DeltaLabCHE(deltaL, deltaA, deltaB, deltaC, deltaH, deltaE);
+        return new DeltaLabChE(deltaL, deltaA, deltaB, deltaC, deltaH, deltaE);
     }
 
     /// <summary>
@@ -136,7 +171,6 @@ public static RGB gamut_clip_preserve_chroma(RGB rgb)
     ///     a and b must be normalized so a^2 + b^2 == 1
     /// </summary>
     // https://bottosson.github.io/posts/gamutclipping/ (MIT)
-    // ReSharper disable once MemberCanBePrivate.Global
     public static float find_gamut_intersection(
         float a,
         float b,
@@ -380,27 +414,27 @@ public static float compute_max_saturation(float a, float b)
     }
 
     // ReSharper disable once InconsistentNaming
-    public struct DeltaLabCHE
+    public struct DeltaLabChE
     {
         // ReSharper disable once InconsistentNaming
-        public double dL;
+        public readonly double dL;
 
         // ReSharper disable once InconsistentNaming
-        public double da;
+        public readonly double da;
 
         // ReSharper disable once InconsistentNaming
-        public double db;
+        public readonly double db;
 
         // ReSharper disable once InconsistentNaming
-        public double dC;
+        public readonly double dC;
 
         // ReSharper disable once InconsistentNaming
-        public double dH;
+        public readonly double dh;
 
         // ReSharper disable once InconsistentNaming
-        public double dE;
+        public readonly double dE;
 
-        public DeltaLabCHE(
+        public DeltaLabChE(
             // ReSharper disable once InconsistentNaming
             double L,
             double a,
@@ -416,7 +450,7 @@ public struct DeltaLabCHE
             da = a;
             db = b;
             dC = C;
-            dH = H;
+            dh = H;
             dE = E;
         }
     }
@@ -440,6 +474,27 @@ public Lab(float L, float a, float b)
         }
     }
 
+    public readonly struct LCh
+    {
+        public readonly float L;
+        public readonly float C;
+
+        // ReSharper disable once InconsistentNaming
+        public readonly float h;
+
+        public LCh(
+            // ReSharper disable once InconsistentNaming
+            float L,
+            // ReSharper disable once InconsistentNaming
+            float C,
+            float h)
+        {
+            this.L = L;
+            this.C = C;
+            this.h = h;
+        }
+    }
+
     public readonly struct RGB
     {
         // ReSharper disable once InconsistentNaming
diff --git a/ColourMeOKGame/Assets/Scripts/GameManager.cs b/ColourMeOKGame/Assets/Scripts/GameManager.cs
index 5c8f6d0..74cf866 100644
--- a/ColourMeOKGame/Assets/Scripts/GameManager.cs
+++ b/ColourMeOKGame/Assets/Scripts/GameManager.cs
@@ -202,24 +202,48 @@ public void SignalGameEnd(List<Gameplay.RoundInfo> playedRounds)
         var roundChromaAcc = 0d;
         var roundHueAcc = 0d;
         var roundPerceivedAcc = 0d;
-
-        var maxDistance = Colorimetry.CalculateDistance(Color.black, Color.white);
-
-        foreach (var distance in playedRounds.Select(round =>
-                     Colorimetry.CalculateDistance(round.TemplateColour, round.ResponseColour)))
+        
+        var templateColour = Color.clear;
+        var responseColour = Color.clear;
+        var roundNumber = 1;
+        foreach (var distance in playedRounds.Take(Gameplay.RoundsPerGame).Select(round =>
+                     Colorimetry.CalculateDistance(templateColour = round.TemplateColour,
+                         responseColour = round.ResponseColour)))
         {
-            roundLightnessAcc += distance.dL / maxDistance.dL;
-            roundChromaAcc += distance.dC / maxDistance.dC;
-            roundHueAcc += distance.dH / maxDistance.dH;
-            roundPerceivedAcc += distance.dE / maxDistance.dE;
+            var dLCh = Colorimetry.CalculateLChSimilarityPercentage(distance);
+            
+            Debug.Log(
+                $"processing round: template={templateColour}, response={responseColour} (dL%={dLCh.L}, dC%={dLCh.C}, dh%={dLCh.h}, dEok={distance.dE:F})");
+
+            roundLightnessAcc += Math.Clamp(dLCh.L * 100d, 0d, 100d);
+            roundChromaAcc += Math.Clamp(dLCh.C * 100d, 0d, 100d);
+            roundHueAcc += Math.Clamp(dLCh.h * 100d, 0d, 100d);
+            roundPerceivedAcc += Math.Clamp((100d - distance.dE) * 100d, 0d, 100d);
+
+            var showcaseTemplate = ui.UI.Q<VisualElement>($"ShowcasePair{roundNumber}TemplateColour");
+            var showcaseResponse = ui.UI.Q<VisualElement>($"ShowcasePair{roundNumber}ResponseColour");
+            var showcaseInfo = ui.UI.Q<Label>($"ShowcasePair{roundNumber}Info");
+
+            if (showcaseTemplate == null || showcaseResponse == null || showcaseInfo == null)
+            {
+                Debug.LogError($"showcase pair {roundNumber} not found");
+                roundNumber++;
+                continue;
+            }
+
+            showcaseTemplate.style.backgroundColor = templateColour;
+            showcaseResponse.style.backgroundColor = responseColour;
+            showcaseInfo.text = $"{roundLightnessAcc:F}% {roundChromaAcc:F}% {roundHueAcc:F}% ({roundPerceivedAcc:F}%)";
+
+            roundNumber++;
         }
 
-        roundLightnessAcc /= playedRounds.Count;
-        roundChromaAcc /= playedRounds.Count;
-        roundHueAcc /= playedRounds.Count;
-        roundPerceivedAcc /= playedRounds.Count;
+        roundLightnessAcc /= Gameplay.RoundsPerGame;
+        roundChromaAcc /= Gameplay.RoundsPerGame;
+        roundHueAcc /= Gameplay.RoundsPerGame;
+        roundPerceivedAcc /= Gameplay.RoundsPerGame;
 
-        var roundAcc = (roundLightnessAcc + roundChromaAcc + roundHueAcc) / 3;
+        var roundAcc = (roundLightnessAcc + roundChromaAcc + roundHueAcc + roundPerceivedAcc + roundPerceivedAcc) / 5;
 
         // make comparison texts
         var lAccDeltaText = (roundLightnessAcc > historicalLightnessAcc ? "+" : "-") +
@@ -237,7 +261,7 @@ public void SignalGameEnd(List<Gameplay.RoundInfo> playedRounds)
             (float)roundPerceivedAcc);
 
         _data.RegisterLocalScore(score);
-        FireLocalPlayerDataChangeCallbacks(GameManager.Instance.Data);
+        FireLocalPlayerDataChangeCallbacks(Instance.Data);
 
         Backend.SubmitScore(score,
             submitRes =>
@@ -255,7 +279,7 @@ public void SignalGameEnd(List<Gameplay.RoundInfo> playedRounds)
                     {
                         Debug.Log("couldn't calculate user rating");
                         TransitionToResultsView(_data.CalculateUserRating());
-                        FireLocalPlayerDataChangeCallbacks(GameManager.Instance.Data);
+                        FireLocalPlayerDataChangeCallbacks(Instance.Data);
                         return;
                     }
 
@@ -277,14 +301,14 @@ public void SignalGameEnd(List<Gameplay.RoundInfo> playedRounds)
 
         void TransitionToResultsView(float rating)
         {
-            var ratingText = rating >= 0 ? $"\nYour rating is {rating}" : "\nYour rating could not be calculated.";
+            var ratingText = rating >= 0 ? $"\nYour rating is {rating:F}" : "\nYour rating could not be calculated.";
 
             // build the result text and show the results view
             ui.UI.Q<Label>("ResultsText").text = string.Join(Environment.NewLine, $"Over {playedRounds.Count} rounds,",
                 $"you were {roundAcc} accurate.", "",
-                $"Lightness was {roundLightnessAcc}% accurate. ({lAccDeltaText} from your average)",
-                $"Chroma was {roundChromaAcc}% accurate. ({cAccDeltaText} from your average)",
-                $"Hue was {roundHueAcc}% accurate. ({hAccDeltaText} from your average)") + ratingText;
+                $"Lightness was {roundLightnessAcc:P}% accurate. ({lAccDeltaText} from your average)",
+                $"Chroma was {roundChromaAcc:P}% accurate. ({cAccDeltaText} from your average)",
+                $"Hue was {roundHueAcc:P}% accurate. ({hAccDeltaText} from your average)") + ratingText;
 
             ui.SetDisplayState(UIManager.DisplayState.ResultsView);
         }
diff --git a/ColourMeOKGame/Assets/Scripts/Gameplay.cs b/ColourMeOKGame/Assets/Scripts/Gameplay.cs
index 446f46a..a82f1b1 100644
--- a/ColourMeOKGame/Assets/Scripts/Gameplay.cs
+++ b/ColourMeOKGame/Assets/Scripts/Gameplay.cs
@@ -9,6 +9,17 @@
 /// </summary>
 public class Gameplay
 {
+    /// <summary>
+    ///     singleton instance of the gameplay class
+    /// </summary>
+    public const int RoundsPerGame = 5;
+
+    /// <summary>
+    ///     seconds per round
+    /// </summary>
+    // ReSharper disable once MemberCanBePrivate.Global
+    public const double SecondsPerRound = 15d;
+
     /// <summary>
     ///     countdown text label for showing the countdown
     /// </summary>
@@ -44,16 +55,6 @@ public class Gameplay
     /// </summary>
     public int Round = -1;
 
-    /// <summary>
-    ///     singleton instance of the gameplay class
-    /// </summary>
-    private const int RoundsPerGame = 5;
-    
-    /// <summary>
-    ///     seconds per round
-    /// </summary>
-    private const double SecondsPerRound = 15d;
-
     /// <summary>
     ///     constructor for the gameplay class
     /// </summary>
@@ -126,20 +127,17 @@ private void StoreRoundInfo()
     /// </summary>
     private void GenerateNewTemplateColour()
     {
-        var r = new Random();
-
-        // - lightness: 0.4-0.8
-        // - chroma: 0.0-0.2
+        // - lightness: 40-80
+        // - chroma: 0.05-0.20
         // - hue: all (0-360)
 
-        var colour = Colorimetry.RawLchToColor(
-            Math.Clamp(r.NextDouble() * 0.4d + 0.4d, 0.4d, 0.8d),
-            Math.Clamp(r.NextDouble() * 0.2d, 0d, 0.2d),
-            Math.Clamp(r.NextDouble() * 360d, 0d, 360d)
-        );
-
-        _templateColour.style.backgroundColor = new StyleColor(colour);
-        Debug.Log($"generated new template colour {colour}");
+        var r = new Random();
+        var l = Math.Clamp(r.NextDouble() * 40d + 40d, 40d, 100d);
+        var c = Math.Clamp(r.NextDouble() * 0.15d + 0.05d, 0.05d, 0.20d);
+        var h = Math.Clamp(r.NextDouble() * 360d, 0d, 360d);
+        var colour = Colorimetry.RawLchToColor(l, c, h);
+        Debug.Log($"generated new template colour LCh({l:F}, {c:F}, {h:F}) -> {colour}");
+        _templateColour.style.backgroundColor = colour;
     }
 
     /// <summary>
diff --git a/ColourMeOKGame/Assets/Scripts/LocalPlayerData.cs b/ColourMeOKGame/Assets/Scripts/LocalPlayerData.cs
index 868b4ec..7ffa0a5 100644
--- a/ColourMeOKGame/Assets/Scripts/LocalPlayerData.cs
+++ b/ColourMeOKGame/Assets/Scripts/LocalPlayerData.cs
@@ -254,17 +254,17 @@ public Score(Dictionary<string, object> data)
             // try to safely construct the score from a backend-provided dictionary
             // for each value, if it's not found, or not a valid value, throw an exception
             
-            if (!data.ContainsKey("timestamp") || !(data["timestamp"] is long timestamp))
+            if (!data.ContainsKey("timestamp") || data["timestamp"] is not long timestamp)
                 throw new ArgumentException("timestamp not found or invalid");
-            if (!data.ContainsKey("noOfRounds") || !(data["noOfRounds"] is int noOfRounds))
+            if (!data.ContainsKey("noOfRounds") || data["noOfRounds"] is not int noOfRounds)
                 throw new ArgumentException("noOfRounds not found or invalid");
-            if (!data.ContainsKey("avgLightnessAccuracy") || !(data["avgLightnessAccuracy"] is float avgLightnessAccuracy))
+            if (!data.ContainsKey("avgLightnessAccuracy") || data["avgLightnessAccuracy"] is not float avgLightnessAccuracy)
                 throw new ArgumentException("avgLightnessAccuracy not found or invalid");
-            if (!data.ContainsKey("avgChromaAccuracy") || !(data["avgChromaAccuracy"] is float avgChromaAccuracy))
+            if (!data.ContainsKey("avgChromaAccuracy") || data["avgChromaAccuracy"] is not float avgChromaAccuracy)
                 throw new ArgumentException("avgChromaAccuracy not found or invalid");
-            if (!data.ContainsKey("avgHueAccuracy") || !(data["avgHueAccuracy"] is float avgHueAccuracy))
+            if (!data.ContainsKey("avgHueAccuracy") || data["avgHueAccuracy"] is not float avgHueAccuracy)
                 throw new ArgumentException("avgHueAccuracy not found or invalid");
-            if (!data.ContainsKey("avgPerceivedAccuracy") || !(data["avgPerceivedAccuracy"] is float avgPerceivedAccuracy))
+            if (!data.ContainsKey("avgPerceivedAccuracy") || data["avgPerceivedAccuracy"] is not float avgPerceivedAccuracy)
                 throw new ArgumentException("avgPerceivedAccuracy not found or invalid");
             
             Timestamp = DateTimeOffset.FromUnixTimeSeconds(timestamp).DateTime;
diff --git a/ColourMeOKGame/Assets/Scripts/SideViewUI.cs b/ColourMeOKGame/Assets/Scripts/SideViewUI.cs
index 698440d..9f53ffd 100644
--- a/ColourMeOKGame/Assets/Scripts/SideViewUI.cs
+++ b/ColourMeOKGame/Assets/Scripts/SideViewUI.cs
@@ -145,19 +145,13 @@ private void RenderFromPlayerData(LocalPlayerData data)
         var playerText = GameManager.Instance.Backend.IsSignedIn
             ? data.LastKnownUsername
             : $"{data.LastKnownUsername} (Not Signed In)";
+        var rating = data.CalculateUserRating();
 
         // finally, set the labels
         _playerText.text = playerText;
         _lightnessAccuracyText.text = $"{lightnessAcc:F}";
         _chromaAccuracyText.text = $"{chromaAcc:F}";
         _hueAccuracyText.text = $"{hueAcc:F}";
-
-        // and set the player rating, but after we get it from the backend
-        // (god I LOVE async (I am LYING out of my teeth))
-        GameManager.Instance.Backend.CalculateUserRating((dtr, rating) =>
-        {
-            if (dtr != Backend.DatabaseTransactionResult.Ok) return;
-            _ratingText.text = $"{rating:F}";
-        });
+        _ratingText.text = $"{rating:F}";
     }
 }
\ No newline at end of file