try IsEventDriven = true

Program.cs

@@ -548,7 +548,6 @@ public class Game : GameWindow {
 
   protected override void OnUpdateFrame(FrameEventArgs e) {
     base.OnUpdateFrame(e);
-    Console.WriteLine("update");
     long now = DateTime.Now.Ticks;
 
     KeyboardState input = KeyboardState;
@@ -692,7 +691,7 @@ public class Game : GameWindow {
     // string[] files = Directory.GetFiles(@"c:\users\colin\pictures\photos\2023\07\14\");
     // string[] files = Directory.GetFiles(@"G:\DCIM\100EOSR6\");
     // string[] files = Directory.GetFiles(@"C:\Users\colin\Pictures\photos\2018\06\23");
-    string[] files = Directory.GetFiles(@"C:\Users\colin\Desktop\Germany all\104D7000");
+    string[] files = Directory.GetFiles(@"C:\Users\colin\Desktop\Germany all\105D7000");
     // string[] files = Directory.GetFiles(@"C:\Users\colin\Desktop\many-birds\");
 
     for (int i = 0; i < files.Count(); i++) {
@@ -749,7 +748,6 @@ public class Game : GameWindow {
 
   protected override void OnRenderFrame(FrameEventArgs e) {
     base.OnRenderFrame(e);
-    Console.WriteLine("render");
     fpsCounter.Update();
 
     LoadAndUnloadImagesAsync();
@@ -896,6 +894,7 @@ static class Program {
     nwSettings.Size = new Vector2i(bestMonitor.WorkArea.Size.X - 2, bestMonitor.WorkArea.Size.Y - 32);
     nwSettings.MinimumSize = UiGeometry.MIN_WINDOW_SIZE;
     nwSettings.Title = "Totte";
+    nwSettings.IsEventDriven = true;
     // FIXME: nwSettings.Icon = ...
 
     using (Game game = new(gwSettings, nwSettings)) {