refactoring (broken right now)

Program.cs

@@ -3,6 +3,7 @@ using SFML.Window;
 using SFML.System;
 using System.Diagnostics;
 using FluidSim.Core;
+using FluidSim.Tests;
 
 namespace FluidSim;
 
@@ -42,7 +43,7 @@ public class Program
         soundEngine.Volume = 100;
         soundEngine.Start();
 
-        scenario = new EngineScenario();
+        scenario = new TestScenario();
         scenario.Initialize(SampleRate);
 
         var stopwatch = Stopwatch.StartNew();
@@ -72,12 +73,6 @@ public class Program
             double speedSmoothing = 8.0;
             currentSpeed += (desiredSpeed - currentSpeed) * (1.0 - Math.Exp(-speedSmoothing * dtClock));
 
-            // ---- THROTTLE INPUT ----
-            targetThrottle = Keyboard.IsKeyPressed(Keyboard.Key.W) ? 1.0 : 0.0;
-            currentThrottle += (targetThrottle - currentThrottle) * (1.0 - Math.Exp(-ThrottleSmoothing * dtClock));
-            // Push to engine scenario (if it's an EngineScenario)
-            if (scenario is EngineScenario engine)
-                engine.Throttle = currentThrottle;
 
             // Generate audio
             double targetAudioClock = currentRealTime + 0.05;