diff --git a/src/AcDream.App/Rendering/FlyCamera.cs b/src/AcDream.App/Rendering/FlyCamera.cs
index eaeb65f..b0e9d24 100644
--- a/src/AcDream.App/Rendering/FlyCamera.cs
+++ b/src/AcDream.App/Rendering/FlyCamera.cs
@@ -11,7 +11,14 @@ public sealed class FlyCamera : ICamera
     public float FovY { get; set; } = MathF.PI / 3f;
     public float Aspect { get; set; } = 16f / 9f;
 
-    public float MoveSpeed { get; set; } = 35f;          // world units per second (AC cell size = 24)
+    /// <summary>
+    /// Default move speed in world units per second. AC's character walks
+    /// at ~4 u/s and runs at ~7 u/s; 12 here is comfortable for navigating
+    /// scenery without overshooting and roughly tracks a fast jog. Hold
+    /// shift while moving to enter "boost" mode at <see cref="BoostSpeed"/>.
+    /// </summary>
+    public float MoveSpeed { get; set; } = 12f;
+    public float BoostSpeed { get; set; } = 50f;
     public float MouseSensitivity { get; set; } = 0.003f;
 
     private const float PitchLimit = 1.5533f;  // ~89 degrees
@@ -33,9 +40,10 @@ public sealed class FlyCamera : ICamera
     /// W/S move forward/back in the horizontal plane (ignoring pitch).
     /// A/D strafe left/right. Up/down translate along world Z.
     /// </summary>
-    public void Update(double dt, bool w, bool a, bool s, bool d, bool up, bool down)
+    public void Update(double dt, bool w, bool a, bool s, bool d, bool up, bool down, bool boost = false)
     {
-        float step = (float)(MoveSpeed * dt);
+        float speed = boost ? BoostSpeed : MoveSpeed;
+        float step = (float)(speed * dt);
 
         // Forward in the horizontal plane (ignore pitch so W doesn't dive into ground).
         var flatForward = new Vector3(MathF.Cos(Yaw), MathF.Sin(Yaw), 0f);
diff --git a/src/AcDream.App/Rendering/GameWindow.cs b/src/AcDream.App/Rendering/GameWindow.cs
index 976be25..a485ea5 100644
--- a/src/AcDream.App/Rendering/GameWindow.cs
+++ b/src/AcDream.App/Rendering/GameWindow.cs
@@ -1003,7 +1003,8 @@ public sealed class GameWindow : IDisposable
             s: kb.IsKeyPressed(Key.S),
             d: kb.IsKeyPressed(Key.D),
             up: kb.IsKeyPressed(Key.Space),
-            down: kb.IsKeyPressed(Key.ControlLeft));
+            down: kb.IsKeyPressed(Key.ControlLeft),
+            boost: kb.IsKeyPressed(Key.ShiftLeft) || kb.IsKeyPressed(Key.ShiftRight));
     }
 
     private void OnCameraModeChanged(bool isFlyMode)