Fix mania requiring PERFECTs to maintain HP

osu.Game.Rulesets.Mania/Scoring/ManiaHealthProcessor.cs

@@ -0,0 +1,23 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Game.Rulesets.Judgements;
+using osu.Game.Rulesets.Scoring;
+
+namespace osu.Game.Rulesets.Mania.Scoring
+{
+    public class ManiaHealthProcessor : DrainingHealthProcessor
+    {
+        /// <inheritdoc/>
+        public ManiaHealthProcessor(double drainStartTime, double drainLenience = 0)
+            : base(drainStartTime, drainLenience)
+        {
+        }
+
+        protected override HitResult GetSimulatedHitResult(Judgement judgement)
+        {
+            // Users are not expected to attain perfect judgements for all notes due to the tighter hit window.
+            return judgement.MaxResult == HitResult.Perfect ? HitResult.Great : judgement.MaxResult;
+        }
+    }
+}