add input delay

src/Aquarium.cpp

@@ -87,7 +87,7 @@ void Aquarium::redraw() {
     entities_need_sorting = true;
   }
 
-  // Add new entities (only if we have them)
+  // Add new entities if we have them
   if (!newEntities.empty()) {
     // Reserve space to minimize reallocations
     entities.reserve(entities.size() + newEntities.size());