camera shake in Y as well (and for less time)

Shared/Camera.cs

@@ -40,13 +40,14 @@ namespace SemiColinGames {
       if (shakeTime > 0) {
         shakeTime -= modelTime;
         int x = random.Next(-4, 5);
-        bbox.Offset(x, 0);
+        int y = random.Next(-4, 5);
+        bbox.Offset(x, y);
       }
       Debug.AddToast($"p: {pos.X}, {pos.Y} c: {bbox.Center.X}");
     }
 
     public void Shake() {
-      shakeTime = 0.5f;
+      shakeTime = 0.3f;
     }
   }
 }