diff --git a/src/Backend.cs b/src/Backend.cs
index e07dc0f..067505f 100644
--- a/src/Backend.cs
+++ b/src/Backend.cs
@@ -148,7 +148,11 @@ namespace WorldOfPeacecraft
 
 		public void MoveTo (int x, int y)
 		{
-			new Thread(() => WalkTo(x,y)).Start();
+			if (Map.GetTiles () [x, y].IsWalkable ()) {
+				Thread thread = new Thread (() => WalkTo (x, y));
+				thread.IsBackground = true;
+				thread.Start ();
+			}
 		}
 
 		private void WalkTo (int x, int y)
@@ -158,7 +162,7 @@ namespace WorldOfPeacecraft
 			walker.SetCoords (path);
 			while (walker.HasMoreSteps()) {
 				SenderBuffer.AddLine("ask:" + walker.NextStep());
-				Thread.Sleep(500);
+				Thread.Sleep(250);
 			}
 		}